How do we know how many slack variables are in an initial tableau?

We can use the Comparison Test to determine the convergence of the given series:

Since 0 ≤ cos^2(n) ≤ 1 for all n, we have:

0 ≤ cos^2(n) / (n^5 + 1) ≤ 1 / (n^5)

The series ∑(n=1 to ∞) 1 / (n^5) is a convergent p-series with p = 5, so by the Comparison Test, the given series is also convergent.

Therefore, the series ∑(n=1 to ∞) cos^2(n) / (n^5 + 1) is convergent.

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The given initial-value problem is a first-order linear differential equation with an initial condition, which can be represented as: y'(t) + 6y(t) = f(t), y(0) = 0.

To solve this problem, we first find the integrating factor, which is e^(∫6 dt) = e^(6t). Multiplying the entire equation by the integrating factor, we get: e^(6t)y'(t) + 6e^(6t)y(t) = e^(6t)f(t).
Now, the left-hand side of the equation is the derivative of the product (e^(6t)y(t)), so we can rewrite the equation as:
(d/dt)(e^(6t)y(t)) = e^(6t)f(t).
Next, we integrate both sides of the equation with respect to t: ∫(d/dt)(e^(6t)y(t)) dt = ∫e^(6t)f(t) dt.
By integrating the left-hand side, we obtain
e^(6t)y(t) = ∫e^(6t)f(t) dt + C,
where C is the constant of integration. Now, we multiply both sides by e^(-6t) to isolate y(t):
y(t) = e^(-6t) ∫e^(6t)f(t) dt + Ce^(-6t).
To find the value of C, we apply the initial condition y(0) = 0:
0 = e^(-6*0) ∫e^(6*0)f(0) dt + Ce^(-6*0),
which simplifies to: 0 = ∫f(0) dt + C.
Since theintegral of f(0) dt is a constant, we can deduce that C = 0. Therefore, the solution to the initial-value problem is: y(t) = e^(-6t) ∫e^(6t)f(t) dt.

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Based on the data we have, it is expected that there is a probability that there are 30 red marbles in the bag.

The probability of an event is  described as a number that indicates how likely the event is to occur.

There are 100 marbles in the bag which  are all either red, white or blue,

100/3 = 33.33  marbles of each color.

From the table ,  we know that Cia randomly drew 10 marbles, and 3 of them were red.

That means Probability of (red) = 3/10 = 0.3

The expected number of red marbles = Probability of (red) x  the total number of marbles

= 0.3 * 100

= 30 red marbles

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To prove that the set a = {0, 1} is numerically equivalent to r (the set of real numbers), we need to find a bijective function that maps each element of a to a unique element in r.

One way to do this is to use the binary representation of real numbers. Specifically, we can define the function f: a -> r as follows:

- For any x in a, we map it to the real number f(x) = 0.x_1 x_2 x_3 ..., where x_i is the i-th digit of the binary representation of x. In other words, we take the binary representation of x and interpret it as a binary fraction in [0, 1).

For example, f(0) = 0.000..., which corresponds to the real number 0. f(1) = 0.111..., which corresponds to the real number 0.999..., the largest number less than 1 in binary.

We can see that f is a bijection, since every binary fraction in [0, 1) has a unique binary representation, and hence corresponds to a unique element in a. Also, every element in a corresponds to a unique binary fraction in [0, 1), which is mapped by f to a unique real number.

Therefore, we have proven that a is numerically equivalent to r, since we have found a bijection between the two sets.

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The value of derivative f '(x) can be simplified to f '(x) = -20x³+4x²+8x+1.Yes the answer agrees.

To find the derivative of f(x) = (1 + 4x²)(x - x²) using the product rule, we first take the derivative of the first term, which is 8x(x-x²), and then add it to the derivative of the second term, which is (1+4x²)(1-2x). Simplifying this expression, we get f '(x) = 8x-12x³+1-2x+4x²-8x³.  

To find the derivative by multiplying first, we would have to distribute the terms and then take the derivative of each term separately, which would be a more tedious process and would not necessarily give us the same answer as using the product rule. .

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The correct answer is option (C) $31.64.

Explanation: Rochelle invests in 500 shares of stock in the HAT Mid-Cap Fund, with the NAV of $18.94 and the offer price of $19.14. The difference between the NAV and the offer price is called the sales load. This sales load of $0.20 is added to the NAV to get the offer price. Rochelle plans to sell all of her shares when she can profit $6,250. The profit she will earn can be calculated by multiplying the number of shares she owns by the profit per share she wishes to earn. So, the profit per share is: Profit per share = $6,250 ÷ 500 shares = $12.50Now, let's calculate the selling price per share. The selling price per share is the sum of the profit per share and the NAV. So, we get: Selling price per share = $12.50 + $18.94 = $31.44. This is the selling price per share at which Rochelle can profit $12.50 per share, which is equivalent to $6,250. However, we must add the sales load to the NAV to get the offer price. So, the NAV required to achieve the selling price per share of $31.44 is: NAV = $31.44 – $0.20 = $31.24. Therefore, the net asset value must be $31.64 in order for Rochelle to sell all of her shares when she can profit $6,250.

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The length of the loan in months is 12 months.

To find the length of the loan in months, we first need to calculate the total amount of interest paid on the loan.
The formula for simple interest is:
Interest = Principal x Rate x Time
Where:
- Principal = $500
- Rate = 13% per year = 0.13
- Time = the length of the loan in years
We want to find the length of the loan in months, so we need to convert the interest rate and loan length accordingly.
First, let's calculate the interest paid:
Interest = $500 x 0.13 x Time
$65 = $500 x 0.13 x Time
Simplifying:
Time = $65 / ($500 x 0.13)
Time = 1.00 years
Now we need to convert 1 year into months:
12 months = 1 year
1 month = 1/12 year
So the length of the loan in months is:
Time = 1.00 years x 12 months/year
Time = 12 months
Therefore, the length of the loan in months is 12 months.

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The acceleration vector when t = 2, is (-1/4, -12).

option B.

The acceleration vector of the point is calculated as follows;

The position vector of the point at time t = y r(t) = (x(t), y(t)) = (ln(2t), 3 - t³).

The velocity vector is calculated as follows;

v(t) = r'(t)

v(t)  = (dx/dt, dy/dt)

v(t) =  (d/dt(ln(2t)), d/dt(3 - t³))

v(t) = (1/t, -3t²)

Acceleration is change in velocity with time, so the acceleration vector is calculated as follows;

a(t) = v'(t) = (d/dt(1/t), d/dt(-3t²))

a(t) = (-1/t², -6t)

The acceleration vector when t = 2, is calculated as follows;

a(2) = (-1/2², -6(2) )

a(2) = (-1/4, -12)

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The probability of seeing a total of 3 heads and 2 tails in 5 tosses of a fair coin is 31.25%.

To find the probability of getting 3 heads and 2 tails when tossing a fair coin 5 times, we can use the binomial probability formula. The formula is:

P(X=k) = C(n, k) * [tex](p^k) * (q^{(n-k)})[/tex]

Where:
- P(X=k) is the probability of getting k successes (heads) in n trials (tosses)
- C(n, k) is the number of combinations of n items taken k at a time
- n is the total number of trials (5 tosses)
- k is the desired number of successes (3 heads)
- p is the probability of a single success (head; 0.5 for a fair coin)
- q is the probability of a single failure (tail; 0.5 for a fair coin)

Using the formula:

P(X=3) = C(5, 3) * (0.5³) * (0.5²)

C(5, 3) = 5! / (3! * (5-3)!) = 10
(0.5³) = 0.125
(0.5²) = 0.25

P(X=3) = 10 * 0.125 * 0.25 = 0.3125

So, the probability of getting 3 heads and 2 tails when tossing a fair coin 5 times is 0.3125 or 31.25%.

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If the null hypothesis is rejected when it is actually true, a Type I error would be committed (A).

In hypothesis testing, there are two types of errors: Type I and Type II. A Type I error occurs when the null hypothesis is rejected even though it is true, leading to a false positive conclusion.

On the other hand, a Type II error occurs when the null hypothesis is not rejected when it is actually false, leading to a false negative conclusion. In this scenario, since the null hypothesis is true and if it were to be rejected, the error committed would be a Type I error (A).

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The expression representing the perimeter of the triangle is 5.6p + 14.9q + 0.1r in centimeters.

The side lengths of the triangle are given as:(1. 1p +9. 5q) centimeters, (4. 5p - 5. 2r)centimeters, and (5. 3r +5. 4q) centimeters.

Perimeter is defined as the sum of the lengths of the three sides of a triangle.

The expression that represents the perimeter of the triangle is:(1. 1p +9. 5q) + (4. 5p - 5. 2r) + (5. 3r +5. 4q)

Simplifying the expression:(1. 1p + 4. 5p) + (9. 5q + 5. 4q) + (5. 3r - 5. 2r) = 5.6p + 14.9q + 0.1r

Therefore, the expression representing the perimeter of the triangle is 5.6p + 14.9q + 0.1r in centimeters.

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The solution to the integral equation using Laplace transform is:

y(t) = (1/16)e^2t - (1/16)e^-2t + (1/4)

To solve the integral equation y(t) 16∫t0(t−v)y(v)dv=12t using Laplace transforms, we need to apply the Laplace transform to both sides and solve for y(s).

Applying the Laplace transform to both sides of the given integral equation, we get:

Ly(t) * 16[1/s^2] * [1 - e^-st] * Ly(t) = 1/(s^2) * 1/(s-1/2)

Simplifying the above equation and solving for Ly(t), we get:

Ly(t) = 1/(s^3 - 8s)

Now, we need to find the inverse Laplace transform of Ly(t) to get y(t). To do this, we need to decompose Ly(t) into partial fractions as follows:

Ly(t) = A/(s-2) + B/(s+2) + C/s

Solving for the constants A, B, and C, we get:

A = 1/16, B = -1/16, and C = 1/4

Therefore, the inverse Laplace transform of Ly(t) is given by:

y(t) = (1/16)e^2t - (1/16)e^-2t + (1/4)

Hence, the solution to the integral equation is:

y(t) = (1/16)e^2t - (1/16)e^-2t + (1/4)

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The moped would need to increase its speed in order to cover a distance of 183.75 miles. Thus, the answer is infinity.

Given the distance traveled by a moped in 4 hours is 140 miles, we are required to write a linear equation that represents this relationship between distance and time. Let x be the length of time the moped has been moving and y be the number of miles the moped has traveled. We have to determine the length of time the moped would have traveled if it traveled 183.75 miles.

Let the distance traveled by the moped be y miles after x hours. It is known that the moped traveled 140 miles after 4 hours.Using the slope-intercept form of a linear equation, we can write the equation of the line that represents this relationship between distance and time asy = mx + cwhere m is the slope and c is the y-intercept.Substituting the values, we have140 = 4m + c ...(1)Since the moped is traveling at a constant rate, the slope of the line is constant.

Let the slope of the line be m.Then the equation (1) can be rewritten as140 = 4m + c ...(2)Now, we have to use the equation (2) to determine how long the moped would have traveled if it traveled 183.75 miles.Using the same equation (2), we can solve for c by substituting the values140 = 4m + cOr, c = 140 - 4mSubstituting this value in equation (2), we have140 = 4m + 140 - 4mOr, 4m = 0Or, m = 0Hence, the slope of the line is m = 0. Therefore, the equation of the line isy = cw here c is the y-intercept.Substituting the value of c in equation (2), we have140 = 4 × 0 + cOr, c = 140.

Therefore, the equation of the line isy = 140Therefore, if the moped had traveled 183.75 miles, then the length of time the moped would have traveled is given byy = 183.75Substituting the value of y in the equation of the line, we have183.75 = 140Therefore, the length of time the moped would have traveled if it traveled 183.75 miles is infinity.

The moped cannot travel 183.75 miles at a constant rate, as it has only traveled 140 miles in 4 hours. The moped would need to increase its speed in order to cover a distance of 183.75 miles. Thus, the answer is infinity.

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The average rate of change can be a good measure for the number of books sold when the function is continuous and exhibits a relatively stable and consistent growth or decline.

The function f(w) = 500 * 2^w represents the number of copies sold after w weeks since the book was published. To determine the domains where the average rate of change is a good measure, we need to consider the characteristics of the function.

Since the function is exponential with a base of 2, it will continuously increase as w increases. Therefore, for positive values of w, the average rate of change can be a good measure for the number of books sold as it represents the growth rate over a specific time interval.

However, it's important to note that as w approaches negative infinity (representing weeks before the book was published), the average rate of change may not be a good measure as it would not reflect the actual sales pattern during that time period.

In summary, the domains where the average rate of change could be a good measure for the number of books sold in the given function are when w takes positive values, indicating the weeks after the book was published and reflecting the continuous growth in sales.

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Answer:

[tex]< -0.902, 0.431 >[/tex]

Step-by-step explanation:

The unit vector of any vector is the vector that has the same direction as the given vector, but simply with a magnitude of 1. Therefore, if we can find the magnitude of the vector at hand, and then multiply [tex]\frac{1}{||v||}[/tex], where ||v|| is the magnitude of the vector, then we can find the unit vector.

Remember the magnitude of the vector is nothing but the pythagorean theorem essentially, so it would be [tex]\sqrt{(-6.9)^{2} +(3.3)^{2} } ,[/tex] which will be [tex]\sqrt{58.5}[/tex]. Now let us multiply the vector by 1 over this value, and rationalize to make your math teacher happy.[tex]< -6.9, 3.3 > * \frac{1}{\sqrt{58.5}} = < \frac{-6.9\sqrt{58.5} }{58.5} , \frac{3.3\sqrt{58.5}}{58.5} >[/tex]

You can put those values into your calculator to approximate and get

[tex]< -0.902, 0.431 >[/tex]

You can always check the answer by finding the magnitude of this vector, and see that it is equal to 1.

Hope this helps

The amount of wrapping paper needed to cover the prism is 2 * (12 * 10 + 12 * 5 + 10 * 5) square inches, and Kenna would have enough wrapping paper if she purchases a roll that covers 4 square feet.

To calculate the amount of wrapping paper needed to cover the rectangular prism, we need to find the surface area of the prism.

The surface area of a rectangular prism is calculated by adding the areas of all six faces.

Given the dimensions of the rectangular prism:

Length = 12 inches

Width = 10 inches

Height = 5 inches

The expression to calculate the amount of wrapping paper needed is:

2 * (length * width + length * height + width * height)

Substituting the values:

2 * (12 * 10 + 12 * 5 + 10 * 5) = 2 * (120 + 60 + 50) = 2 * 230 = 460 square inches

Therefore, Kenna would need 460 square inches of wrapping paper to cover the prism.

To determine if Kenna has enough wrapping paper, we need to convert the square inches to square feet since the roll of wrapping paper covers 4 square feet.

1 square foot = 144 square inches

Therefore, 460 square inches is equivalent to: 460 / 144 ≈ 3.19 square feet

Since Kenna purchases a roll of wrapping paper that covers 4 square feet, she would have enough wrapping paper to cover the prism.

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To find the 38th term of the sequence given as 9, 15, 21, we can observe that each term is obtained by adding 6 to the previous term. By continuing this pattern, we can determine the 38th term.

The given sequence starts with 9, and each subsequent term is obtained by adding 6 to the previous term. This means that the second term is 9 + 6 = 15, and the third term is 15 + 6 = 21.
Since there is a constant difference of 6 between each term, we can infer that the pattern continues for the remaining terms. To find the 38th term, we can apply the same pattern. Adding 6 to the third term, 21, we get 21 + 6 = 27. Adding 6 to 27, we obtain the fourth term as 33, and so on.
Continuing this pattern until the 38th term, we find that the 38th term is 9 + (37 * 6) = 231.
Therefore, the 38th term of the sequence is 231.

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The protective sac around the heart is the pericardium, while the valves within the heart regulate the blood flow. The pulmonary artery carries blood to the lungs, and the heart chambers, specifically the right atrium and ventricle, facilitate this process.

Protective sacs (valves): The heart is enclosed within a protective sac called the pericardium, which consists of two layers. The outer layer, the fibrous pericardium, provides structural support and protection. The inner layer, the serous pericardium, produces a fluid that reduces friction during heart contractions. Valves within the heart, such as the atrioventricular (AV) valves and semilunar valves, prevent backflow of blood and maintain the flow in a forward direction.

Carries blood to the body (pulmonary): The pulmonary artery carries deoxygenated blood from the right ventricle of the heart to the lungs. It branches into smaller vessels and eventually reaches the capillaries in the lungs, where oxygen is absorbed, and carbon dioxide is released.

Carries blood to the lungs (heart chambers): The right atrium receives deoxygenated blood from the body through the superior and inferior vena cava. From the right atrium, blood flows into the right ventricle, which pumps it into the pulmonary artery for transport to the lungs.

Open and close (pericardium): The pericardium is a protective sac surrounding the heart and does not open or close. However, the heart's valves, mentioned earlier, open and close to regulate the flow of blood. The opening and closing of valves create the characteristic sounds heard during a heartbeat.

Atria and ventricles (aorta): The heart is divided into four chambers: two atria (right and left) and two ventricles (right and left). The atria receive blood returning to the heart, while the ventricles pump blood out of the heart. The aorta is the largest artery in the body and arises from the left ventricle. It carries oxygenated blood from the heart to supply the entire body with nutrients and oxygen.

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The integral of [tex]t^3[/tex] from -1 to 4 is 63.75

To find the integral of [tex]t^3[/tex] from -1 to 4,

-Determine the antiderivative of [tex]t^3[/tex].

-The antiderivative of [tex]t^3[/tex] is [tex]( \frac{1}{4} )t^4 + C[/tex], where C is the constant of integration.

- Apply the Fundamental Theorem of Calculus. Evaluate the antiderivative at the upper limit (4) and subtract the antiderivative evaluated at the lower limit (-1).
[tex](\frac{1}{4}) (4)^4 + C - [(\frac{1}{4} )(-1)^4 + C] = (\frac{1}{4}) (256) - (\frac{1}{4}) (1)[/tex]

-Simplify the expression.
[tex](64) - (\frac{1}{4} ) = 63.75[/tex]

So, the integral of [tex]t^3[/tex] from -1 to 4 is 63.75.

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Out of the integers listed, 19, 101, 107, and 113 are prime, while 27 and 93 are not.

To determine if an integer is prime, it must have only two distinct positive divisors: 1 and itself. Here are the results for the integers you provided:
a) 19 is prime (divisors: 1, 19)
b) 27 is not prime (divisors: 1, 3, 9, 27)
c) 93 is not prime (divisors: 1, 3, 31, 93)
d) 101 is prime (divisors: 1, 101)
e) 107 is prime (divisors: 1, 107)
f) 113 is prime (divisors: 1, 113)

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The net signed area between f(x) = 2x - 6 and the x-axis over the interval [-6, 6] is -72.

To find the net signed area between the function f(x) = 2x - 6 and the x-axis over the interval [-6, 6], we need to calculate the definite integral of f(x) from -6 to 6.

The definite integral of a function represents the signed area between the function and the x-axis over a given interval. Since f(x) is a linear function, the area between the function and the x-axis will be in the form of a trapezoid.

The definite integral of f(x) from -6 to 6 can be calculated as follows:

∫[-6,6] (2x - 6) dx

To evaluate this integral, we can apply the power rule of integration:

= [x^2 - 6x] evaluated from -6 to 6

Substituting the upper and lower limits:

= (6^2 - 6(6)) - (-6^2 - 6(-6))

Simplifying further:

= (36 - 36) - (36 + 36)

= 0 - 72

= -72

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Thus, the critical value is 0.707 and there is not enough evidence to support the claim that there is a linear correlation between the heights of mothers and their daughters.

Based on the information provided, the linear correlation coefficient between the heights of mothers and daughters is 0.693.

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The volume of the tank is 30 ft³. In the problem its given the density of a fish tank is 0.4 fish per cubic feet.There are 12 fish in the tank.

Considering the given data,

The density of a fish tank is 0. 4 fish over feet cubed.

In order to find the volume of the tank we can use the formula;

Density = Number of fish / Volume of tank

Rearranging the above formula to find Volume of the tank:

Volume of tank = Number of fish / Density

Volume of tank = 12 fish / 0.4 fish per cubic feet

Therefore,

Volume of tank = 30 cubic feet

Hence the required answer for the given question is 30 cubic ft

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Jasmine wants to start saving to purchase an apartment. Her goal is to save $225,000. If she deposits $180,000 into an account that pays 3. 12% interest compounded monthly, approximately how long will it take for her money to grow to the desired amount?

The first step to solving the problem is to understand the formula for calculating interest on a compounded monthly basis.The formula for calculating compound interest on a monthly basis is as follows:

FV = P(1 + i/n)^(n * t) whereFV = future valueP = principal amounti = interest raten = number of times interest is compounded per yeart = number of years In this case:FV = 225,000 (the desired amount)P = 180,000i = 3.12% = 0.0312n = 12 (since the interest is compounded monthly)t = unknown Substituting these values into the formula, we get:225,000 = 180,000(1 + 0.0312/12)^(12t) Dividing both sides by 180,000, we get:1.25 = (1 + 0.0312/12)^(12t) Taking the natural log of both sides, we get:ln(1.25) = 12t ln(1 + 0.0312/12)Solving for t, we get:t = ln(1.25) / [12 ln(1 + 0.0312/12)]t = 7.64 years (rounded to the nearest year)Therefore, it will take approximately 8 years (rounded to the nearest year) for Jasmine's money to grow to the desired amount.

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The correct answer is 6 years. Compound interest is the interest rate applied to the principal and interest earned. it will take Jasmine approximately 6 years to save $225,000.

Essentially, it implies that interest is earned on both the principal and interest accumulated over time.

We may use the formula [tex]A=P(1+r/n)^{(nt)[/tex]

to calculate the time it will take for Jasmine's money to grow to $225,000,

where

A is the desired amount,

P is the principal amount deposited,

r is the annual interest rate,

n is the number of times interest is compounded per year, and

t is the number of years.

Here's how we'll go about it.

[tex]A=P(1+r/n)^{(nt)[/tex]

Here,

A = $225,000

P = $180,000

r = 3.12%

n = 12

t = ?

Let's plug in the numbers and solve for t.

[tex]225000=180000(1+0.0312/12)^{(12t)}[/tex]

[tex]225000/180000=(1+0.0312/12)^{(12t)[/tex]

[tex]1.25=(1.0026)^{(12t)[/tex]

Log (1.25) = Log [tex](1.0026)^{(12t)[/tex]

Log (1.25) = 12t(Log (1.0026))

t = [Log (1.25)] / [12 Log (1.0026)]

t ≈ 6 years (rounded to the nearest year)

Therefore, it will take Jasmine approximately 6 years to save $225,000.

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In the given function, m(h) = 300 * (3/4) * h, the variable h represents the number of hours after the medicine is administered.

To find the value of m(0.5), we substitute h = 0.5 into the function:

m(0.5) = 300 * (3/4) * 0.5

Simplifying the expression:

m(0.5) = 300 * (3/4) * 0.5

= 225 * 0.5

= 112.5

Therefore, m(0.5) represents 112.5 milligrams of the medicine in the patient's body after 0.5 hours since the medicine was administered.

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Answer:

562 bags.

Step-by-step explanation:

8,430 divided by 15 is 562.

We use the chain rule and the power rule of differentiation and get the value of y' as, [tex]y' = (4x^3 - (15/2)x^{(1/2)}) / ln(6).[/tex]

The given equation defines a function y that is the natural logarithm (base e) of an algebraic expression involving x.

[tex]y = log6(x^4 - 5x^{(3/2)})[/tex]

We can find the derivative of y with respect to x using the chain rule and the power rule of differentiation.

The derivative of y is denoted as y' and is obtained by differentiating the expression inside the logarithm with respect to x, and then multiplying the result by the reciprocal of the natural logarithm of the base.

[tex]y' = (1 / ln(6)) * d/dx (x^4 - 5x^{(3/2}))[/tex]

The final expression for y' involves terms that include the power of x raised to the third and the half power, which can be simplified as necessary.

[tex]y' = (1 / ln(6)) * (4x^3 - (15/2)x^{(1/2)})[/tex]

Therefore, [tex]y' = (4x^3 - (15/2)x^{(1/2)}) / ln(6).[/tex]

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To show that the sequence an = 5an−1 − 6an−2 satisfies the recurrence relation for all integers n with n ≥ 2, we need to substitute the formula for an into the relation and verify that the equation holds true.

So, we have:

an = 5an−1 − 6an−2

5an−1 = 5(5an−2 − 6an−3)     [Substituting an−1 with 5an−2 − 6an−3]

= 25an−2 − 30an−3

6an−2 = 6an−2

an = 25an−2 − 30an−3 − 6an−2   [Adding the above two equations]

Now, we simplify the above equation by grouping the terms:

an = 25an−2 − 6an−2 − 30an−3

= 19an−2 − 30an−3

We can see that the above expression is in the form of the recurrence relation. Thus, we have verified that the given sequence satisfies the recurrence relation an = 5an−1 − 6an−2 for all integers n with n ≥ 2.

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The value of cos(2022π) is easy to compute by hand because the argument (2022π) is a multiple of 2π, which means it lies on the x-axis of the unit circle.

Recall that the unit circle is the circle centered at the origin with radius 1 in the Cartesian plane. The x-coordinate of any point on the unit circle is given by cos(θ), where θ is the angle between the positive x-axis and the line segment connecting the origin to the point. Similarly, the y-coordinate of the point is given by sin(θ).

Since 2022π is a multiple of 2π, it represents an angle that has completed a full revolution around the unit circle. Therefore, the point corresponding to this angle lies on the positive x-axis, and its x-coordinate is equal to 1. Hence, cos(2022π) = 1.

In summary, cos(2022π) is easy to compute by hand because the argument lies on the x-axis of the unit circle, and its x-coordinate is equal to 1.

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The correct answer is: CDs No CDs Row Total 23 14 37 Smartphone 20.8 19.2 14 22 36 No Smartphone 16.2 16.8 Column Total 37 36 73 using contingency table.

This table shows the expected values for the chi-square homogeneity test. These values were obtained by calculating the expected frequencies based on the row and column totals and the sample size. The observed values are compared to the expected values to determine if there is a significant association between the two variables (buying CDs and owning a smartphone) using contingency table.

A statistical tool used to show the frequency distribution of two or more categorical variables is a contingency table, sometimes referred to as a cross-tabulation table. It displays the number or percentage of observations for each set of categories for the variables. Using contingency tables, you may spot trends and connections between several variables.

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