Write a real-world problem that you could represent with the equation. 4x + 5 = 37. Solve the equation to find the answer to your question

The time it will take for the radioactive substance to decay to half of its original amount is approximately 3.71 years.

To find the time it takes for the substance to decay to half of its original amount, we need to solve the equation A(t) = A(0)/2, where A(t) is the amount of substance at time t and A(0) is the original amount of substance.

A(0)/2 = 200e^(-0.187t)

Dividing both sides by 200 gives:

e^(-0.187t) = 1/2

Taking the natural logarithm of both sides gives:

-0.187t = ln(1/2) = -ln(2)

Solving for t gives:

t = (-ln(2))/-0.187 ≈ 3.71 years

Therefore, the time it takes for the radioactive substance to decay to half of its original amount is approximately 3.71 years, which is option d).

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Answer:

(-7)²

Step-by-step explanation:

(-7) × (-7) = (-7)²

You must have parentheses around the -7 since

(-7)² and -7² evaluate to different numbers.

(-7)² = (-7) × (-7) = 49

-7² = -(7²) = -49

The partial derivative is (∂w/∂x)_y = 48 at the point where x=2 and y=1.

The given expression can be simplified as:

[tex]w = 4x^3y^3z^2[/tex]

Taking the partial derivative of w with respect to x, while holding y constant, we get:

∂w/∂x = [tex]12x^2y^3z^2[/tex]

Substituting x=2, y=1, and z=1, we get:

∂w/∂x = [tex]12(2)^2(1)^3(1)^2 = 48[/tex]

we don't need to evaluate (∂w/∂x) y separately because (∂w/∂x)_y represents the partial derivative of w with respect to x, while holding y constant. Therefore, (∂w/∂x)_y is the same as (∂w/∂x) evaluated at y=1.

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Answer:

Step-by-step explanation:

2.06

Answer:

35/17 = 2.06 (to the nearest hundredth)

Answer:

1.) First question

2.) Second question

*Feel free to ask any questions on how to get the individual answers*

Finding the Quartiles:

- Quartiles separate a data set into four sections.

- The median is the second quartile Q2. It divides the ordered data set into higher and lower halves.  

- The first quartile, Q1, is the median of the lower half not including Q2.

- The third quartile, Q3, is the median of the higher half not including Q2

No, it is not possible for both a and a⁻ ¹  to have integer entries and for det(a) to be equal to 3.

If the entries of both a and a⁻ ¹  are integers, it is not possible for det(a) to be equal to 3.

To see why, note that the determinant of a matrix and its inverse are related by the formula det(a⁻ ¹ ) = 1/det(a). Therefore, we have det(a) det(a⁻ ¹ ) = det(aa⁻ ¹ ) = det(I) = 1, where I is the identity matrix.

If det(a) = 3, then we would need det(a⁻ ¹ ) = 1/3 in order for det(a)

det(a⁻ ¹ ) = 1. However, since a⁻ ¹  also has integer entries, this is not possible, because 1/3 is not an integer.

Thus, it is not possible for both a and a⁻ ¹  to have integer entries and for det(a) to be equal to 3.

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The solution to the equation is x = 0.

Option D is the correct answer.

We have,

The equation is:

(1 - 3x)^{1/3} - 1 = x

Let's start by isolating the radical term by adding 1 to both sides:

(1 - 3x)^(1/3) = x + 1

Next, we'll cube both sides to eliminate the radical:

[(1 - 3x)^(1/3)]^3 = (x + 1)^3

1 - 3x = (x + 1)^3

1 - 3x = x^3 + 3x^2 + 3x + 1

0 = x^3 + 3x^2 + 6x

Now we have a cubic equation, which we can solve by factoring out an x:

x(x^2 + 3x + 6) = 0

The quadratic factor doesn't have any real roots (since its discriminant is negative),

So the only solution is x = 0.

i.e

(1 - 3x)^(1/3) - 1 = 1^(1/3) - 1 = 0.

Thus,

The solution to the equation is x = 0.

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Answer:

3 , 4 , 2 , 2 , 1 , 1

Step-by-step explanation:

tan A = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{BC}{AC}[/tex] = [tex]\frac{a}{b}[/tex] → 3

tan B = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{AC}{BC}[/tex] = [tex]\frac{b}{a}[/tex] → 4

cos A = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{AC}{AB}[/tex] = [tex]\frac{b}{c}[/tex] → 2

sin B = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{AC}{AB}[/tex] = [tex]\frac{b}{c}[/tex] → 2

sin A = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{BC}{AB}[/tex] = [tex]\frac{a}{c}[/tex] → 1

cos B = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{BC}{AB}[/tex] = [tex]\frac{a}{c}[/tex] → 1

On an average day, they will see about the same percentage of patients with blood types A and B.

Statement D is accurate considering the options presented because

according to this claim, the hospital sees roughly the same number of patients with blood types A and B on a daily basis.

It doesn't give precise percentages or a breakdown of the distribution of blood types, but it suggests that blood types A and B are very common in the patients they encounter. Hence, option D is the correct answer.

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The output for the Turing machine when run on the tape "b 1 b" is "b 0 b".

The Turing machine starts in state 1 and reads the symbol "b" on the tape. It then writes a "0" on the tape, moves left to the symbol "1", and transitions to state 2.

In state 2, the Turing machine reads the symbol "1" on the tape, writes a "b", moves left to the symbol "b", and transitions to state 3.

In state 3, the Turing machine reads the symbol "b" on the tape, writes a "1", moves right to the symbol "4", and transitions to state 4.

In state 4, the Turing machine reads the symbol "0" on the tape, writes a "1", moves right to the symbol "b", and stays in state 4.

Since there are no more transitions defined for state 4, the Turing machine stops and the final tape configuration is "b 0 b".

Therefore, the conclusion is that the output for the Turing machine when run on the tape "b 1 b" is "b 0 b".

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(a) The distribution of X, the number of these 9 cases that are resistant to any antibiotic, is binomial with n = 9 and p = 0.30.

(b)  the mean of X is 2.7, rounded to one decimal place.

What is the mean and standard deviation?

The standard deviation is a summary measure of the differences of each observation from the mean. If the differences themselves were added up, the positive would exactly balance the negative and so their sum would be zero. Consequently, the squares of the differences are added.

(a) The distribution of X, the number of these 9 cases that are resistant to any antibiotic, is binomial with n = 9 and p = 0.30.

(b) The mean of X can be calculated using the formula:

mean of X = n * p

Substituting the given values, we get:

mean of X = 9 * 0.30 = 2.7

Therefore, the mean of X is 2.7, rounded to one decimal place.

Hence,

(a) The distribution of X, the number of these 9 cases that are resistant to any antibiotic, is binomial with n = 9 and p = 0.30.

(b)  the mean of X is 2.7, rounded to one decimal place.

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To determine if the difference in height between the two trees is sufficient to meet the slope constraint, we need to calculate the slope of the zip line.

First, we need to calculate the horizontal distance between the two trees. If the trees are 130 feet apart and each tree is about 40 feet tall, then the horizontal distance between the tops of the trees is:

130 feet - 2(40 feet) = 50 feet

Next, we need to calculate the vertical distance between the two endpoints of the zip line. If Chantal wants to start the zip line 25 feet high in one tree and end it 10 feet high in the other tree, then the vertical distance between the two endpoints is:

25 feet - 10 feet = 15 feet

Therefore, the slope of the zip line is:

slope = rise/run = 15 feet/50 feet = 0.3

According to industry standards, the maximum slope for a zip line is typically around 0.5, although this can vary depending on the specific design and location. Since the slope of Chantal's zip line is only 0.3, it meets the slope constraint and is safe to use.

The number of solutions the system of equations have is (a) no solution

From the question, we have the following parameters that can be used in our computation:

y = 0.5x + 1

y = 0.5x + 3

Subtract the equations

So, we have

0 = -2

The above equation is false

This means that the number of solutions in the equation is 0

i.e. no solution

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Answer:

As the highest judicial officer in Ghana, the Chief Justice has several important functions. Here are two of the most significant ones

Step-by-step explanation:

Head of the Judiciary: The Chief Justice is the head of the judiciary in Ghana. As such, they are responsible for overseeing the administration of justice in the country. This includes managing the courts, ensuring the efficient and effective delivery of justice, and maintaining the integrity of the judiciary. The Chief Justice is also responsible for appointing judges and other judicial officers, as well as determining their terms of service.

Constitutional Interpretation: The Chief Justice is responsible for interpreting the constitution of Ghana. This means that they have the authority to determine the meaning and application of the provisions of the constitution. The Chief Justice is also responsible for adjudicating on constitutional disputes, including those that arise between different branches of government. As such, the Chief Justice plays a critical role in ensuring that Ghana remains a constitutional democracy, with the rule of law at its core.

To determine if the given set is a subspace of $P_n$, we need to check if it satisfies the three conditions for being a subspace: closure under addition, closure under scalar multiplication, and contains the zero vector.

Let's consider the set of polynomials of the form $p(t) = at^2$, where $a \in \mathbb{R}$.Firstly, let's check if the set is closed under addition. Take two arbitrary polynomials $p_1(t) = a_1t^2$ and $p_2(t) = a_2t^2$ in the set. Then, their sum is $p_1(t) + p_2(t) = (a_1 + a_2)t^2$, which is still in the set of polynomials of the form $at^2$. Therefore, the set is closed under addition.

Next, we need to check if the set is closed under scalar multiplication. Take an arbitrary polynomial $p(t) = at^2$ in the set and a scalar $c \in \mathbb{R}$. Then, $cp(t) = cat^2$, which is still in the set of polynomials of the form $at^2$. Thus

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Answer:

Step-by-step explanation:

Have a Nice Best Day : ) Please Give Me Brainliest

The probability that the service center will receive more than 4 calls in a 1-minute period is 0.2061. The probability that the first call is received between 8:01 and 8:02 am is approximately 0.2381.

(a) Let X be the number of calls in a 1-minute period. Then, X ~ Poisson(2). We need to find P(X > 4). Using the Poisson probability formula:

P(X > 4) = 1 - P(X ≤ 4) = 1 - ∑(k=0 to 4) e^(-2) * 2^k / k!

Calculating the sum, we get:

P(X > 4) = 1 - (e^(-2)*2^0/0! + e^(-2)*2^1/1! + e^(-2)*2^2/2! + e^(-2)*2^3/3! + e^(-2)*2^4/4!)

= 1 - (0.4060 + 0.2707 + 0.0902 + 0.0225 + 0.0045)

= 0.2061

Therefore, the probability that the service center will receive more than 4 calls in a 1-minute period is 0.2061.

(b) Let Y be the time (in minutes) between the opening of the center and the first call received. Then, Y ~ Exponential(2). We need to find P(1 < Y ≤ 2). Using the Exponential probability formula:

P(1 < Y ≤ 2) = ∫(1 to 2) 2e^(-2y) dy

Evaluating the integral, we get:

P(1 < Y ≤ 2) = e^(-2) - e^(-4) ≈ 0.2381

Therefore, the probability that the first call is received between 8:01 and 8:02 am is approximately 0.2381.

(c) Let X be the number of calls in a 1-minute period. We want to find the number of calls that is too many, such that if the center receives that many calls, the supervisor will reject the hypothesis of 2 calls per minute, on average, at a significance level of 0.05. This is equivalent to finding the critical value of X for a Poisson distribution with λ = 2 and a right-tailed test with α = 0.05. Using a Poisson distribution table or a calculator, we find that the critical value is 5.

Therefore, if the center receives 6 or more calls in a 1-minute period, the supervisor will reject the hypothesis of 2 calls per minute, on average, at a significance level of 0.05.

(d) Let X be the number of calls in a 1-minute period. We want to find P(2 out of 3 calls are complaints). Since each call is a complaint with probability 0.2 and a request for assistance with probability 0.8, the distribution of X is a Binomial(3, 0.2). Therefore:

P(2 out of 3 calls are complaints) = P(X = 2) = (3 choose 2) * 0.2^2 * 0.8^1 = 0.096

Therefore, the probability that exactly 2 out of 3 calls are complaints is 0.096.

(e) Let X be the total number of calls in a 5-minute period, and let Y be the number of complaints in a 5-minute period. Then, X ~ Poisson(10) and Y ~ Binomial(25, 0.2), since there are 25 independent 1-minute periods in a 5-minute period, and each call is a complaint with probability 0.2.

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The statement that the monetary value and size of canvas are both considered categorical data is False.

Categorical data refers to information that can be segregated into distinct groups or classes. It has the potential to be classified as either nominal or ordinal. Data that lacks any natural sequence or hierarchy, like the type of snow cone flavor, is referred to as nominal data.

The dimensions of the canvas can be classified into groups, including small, medium, and large. Data that is quantifiable or can be enumerated is known as numerical data. The value of this scenario can be quantified in terms of currency, specifically dollars.

To sum up, the numerical data denotes the monetary value, whereas the canvas's dimensions classify as categorical data.

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(a) The probability that a person is infected given a positive test result is approximately 0.0541 or 5.41%.

(b) The probability that a person is not infected given a negative test result is approximately 0.9999 or 99.99%.

(a) To determine the probability that a person is infected given a positive test result, we can use Bayes' Theorem. Let's denote the following events:

A: The person is infected.

B: The person tests positive.

We are given the following probabilities:

P(A) = 1/250 (probability of a person being infected)

P(B|A) = 0.9 (probability of a positive test result given the person is infected)

P(B|A') = 0.15 (probability of a positive test result given the person is not infected).

We want to find P(A|B), the probability that the person is infected given a positive test result.

According to Bayes' Theorem, we have:

[tex]P(A|B) = (P(B|A) \times P(A)) / P(B)[/tex]

To calculate P(B), we need to consider the probabilities of both true positives (infected and positive test) and false positives (not infected but positive test):

[tex]P(B) = P(B|A) \times P(A) + P(B|A') \times P(A')[/tex]

Substituting the values into the equation, we have:

[tex]P(A|B) = (0.9 \times (1/250)) / [(0.9 \times (1/250)) + (0.15 \times (249/250))][/tex]

Simplifying this equation will yield the probability that a person is infected given a positive test result.

(b) To determine the probability that a person is not infected given a negative test result, we can again use Bayes' Theorem. Let's denote the events as follows:

A: The person is infected.

B: The person tests negative.

We are given:

P(A) = 1/250 (probability of a person being infected)

P(B|A) = 0.1 (probability of a negative test result given the person is infected)

P(B|A') = 0.85 (probability of a negative test result given the person is not infected)

We want to find P(A'|B), the probability that the person is not infected given a negative test result.

Using Bayes' Theorem, we have:

[tex]P(A'|B) = (P(B|A') \times P(A')) / P(B)[/tex]

To calculate P(B), we need to consider the probabilities of both true negatives (not infected and negative test) and false negatives (infected but negative test):

[tex]P(B) = P(B|A') \times P(A') + P(B|A) \times P(A)[/tex]

Substituting the values into the equation, we have:

[tex]P(A'|B) = (0.85 \times (249/250)) / [(0.85 \times (249/250)) + (0.1 \times (1/250))][/tex]  

Simplifying this equation will give us the probability that a person is not infected given a negative test result.

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The volume of Cylinder #2 is greater than the volume of Cylinder #1 by D) 157 cm³.

The volume is the capacity of a three-dimensional object or a cylinder.

The Volume of a cylinder is given by the formula: πr²h.

Radius = 5 cm

Height = 18 cm

Volume = πr²h

= 3.14 x 25 x 18

= 1,413 cm³

Radius = 5 cm

Height = 20 cm

Volume = πr²h

= 3.14 x 25 x 20

= 1,570 cm³

Difference in volume = 157 cm³ (1,570 - 1,413)

Thus, we can conclude that Cylinder #2 is greater than Cylinder #1 in volume by Option D) 157 cm³.

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The probability that a random point on the white circle lies on the red-shaded circle is P = 0.25

To do this, we just need to take the quotient between the two areas, and remember that the area of a circle of radius R is:

A = pi*R²

The radius of the white circle is 8 units, while the radius of the red circle is 4 units, then the probability that a random point on the white circle also lies on the red circle here will be:

P = (pi*4²/pi*8²)

We ingore the "pi" factor because it is cancelled.

Then:

P = 4²/8²

P = 0.25

That is the probability.

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Therefore, the value of δx for this problem is 2.

To find the value of δx, we first need to understand what l4 means in the context of this function.
l4 refers to the fourth subinterval of the interval [2,10]. To find the value of l4, we need to divide the interval [2,10] into smaller subintervals.
Let's first find the total number of subintervals. We can do this by subtracting the lower limit from the upper limit and dividing by the desired length of each subinterval:
Total number of subintervals = (10 - 2) / δx
We want to find the fourth subinterval, so we need to determine the value of δx that gives us four subintervals.
(10 - 2) / δx = 4
Solving for δx, we get:
δx = (10 - 2) / 4 = 2
Therefore, the value of δx for this problem is 2.

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The figure is misleading for at least two reasons:

Different lengths of time that each artist has been active: The Beatles were active from 1960 to 1970. Elvis Presley was active from 1954 to 1977. Michael Jackson was active from 1971 to 2009. Elton John has been active since 1969. Madonna has been active since 1982.

This means that Elvis Presley had over two decades to sell albums, singles, and videos, while The Beatles only had a decade.

Different ways that music is consumed today: In the past, people would buy albums and singles. Today, people are more likely to stream music or download individual songs.

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If rxy = 0.83, we can conclude that x and y have a relatively strong positive linear relationship or correlation.

The correlation coefficient (r) measures the strength and direction of the linear relationship between two variables, in this case, x and y. The value of r ranges between -1 and 1. A positive value indicates a positive relationship, meaning that as one variable increases, the other variable tends to increase as well.

In this case, with rxy = 0.83, the correlation coefficient is close to 1, suggesting a strong positive linear relationship. This means that when x increases, y also tends to increase, and vice versa. The closer the value of r is to 1, the stronger the linear relationship between x and y.

It is important to note that correlation does not imply causation. While a high correlation coefficient indicates a strong linear relationship, it does not provide information about the underlying cause or direction of the relationship between the variables. Other factors and variables may influence the relationship, and further analysis may be required to understand the nature of the relationship between x and y.

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The closed form for the sum is (n(n+1)/4) * (n-4)(n+1). The closed form for the sum ∑(j=1 to n) (j^3 - 2j) needs to be derived, and it needs to be proven that the closed form indeed equals this sum. The dominant term in the closed form expression also needs to be identified.

To derive a closed form for the sum ∑(j=1 to n) (j^3 - 2j), we can apply the formulas for the sum of cubes and the sum of arithmetic series.

1. Sum of cubes: ∑(j=1 to n) j^3 = (n(n+1)/2)^2

2. Sum of arithmetic series: ∑(j=1 to n) j = (n(n+1))/2

Using these formulas, we can rewrite the given sum as:

∑(j=1 to n) (j^3 - 2j) = ∑(j=1 to n) j^3 - ∑(j=1 to n) 2j

Applying the formulas, we get:

= [(n(n+1)/2)^2] - [2 * (n(n+1))/2]

= (n^2(n+1)^2)/4 - n(n+1)

= (n^2(n+1)^2 - 4n(n+1))/4

= [(n(n+1))/4] * [(n(n+1)) - 4]

= (n(n+1)/4) * (n^2 - 3n - 4)

= (n(n+1)/4) * (n^2 - 4n + n - 4)

= (n(n+1)/4) * [n(n-4) + 1(n-4)]

= (n(n+1)/4) * (n-4)(n+1)

Therefore, the closed form for the sum is (n(n+1)/4) * (n-4)(n+1).

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The geometric Transformation shown in the line of music is: Reflection

In mathematics, a geometric transformation is referred to as any bijection of a set to itself (or perhaps to another such set) possessing some salient geometrical underpinning. Furthermore, it is a function whose domain and range are a defined sets of points  such that the function is bijective so that its inverse exists.

Now, there are different transformations such as:

Rotation

Reflection

Translation

From the given image, we can see that the left side is a mirror image of the right side of music notes and as such we can say that the transformation undergone is called Reflection.

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If you use a 0.05 level of significance in a two-tail hypothesis test and the calculated z-statistic is -1.79, you would fail to reject the null hypothesis.

In a hypothesis test, we compare the calculated test statistic (in this case, the z-statistic) to a critical value from a standard normal distribution based on the chosen level of significance (0.05). For a two-tailed test, the critical values are ±1.96. If the calculated z-statistic falls outside this range, we reject the null hypothesis. If it falls inside this range, we fail to reject the null hypothesis. In this case, the calculated z-statistic is -1.79, which falls between the critical values of ±1.96. Therefore, we fail to reject the null hypothesis and conclude that there is not enough evidence to support the alternative hypothesis at the 0.05 level of significance.

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The normal distribution is always symmetric, meaning that its probability density function is symmetric around the mean. Therefore, for a normal distribution, the mean, median, and mode are all equal.

The student's t distribution and chi-square distribution are not always symmetric. The symmetry of the student's t distribution depends on the degrees of freedom. When the degrees of freedom are greater than one, the distribution is symmetric. However, when the degrees of freedom are less than or equal to one, the distribution is not symmetric. The chi-square distribution is not symmetric when the degrees of freedom are less than two.

The F distribution, also known as the Fisher-Snedecor distribution, is not always symmetric. The symmetry of the F distribution depends on the degrees of freedom of the numerator and denominator. When the degrees of freedom of the numerator and denominator are equal, the distribution is symmetric.

However, when the degrees of freedom are not equal, the distribution is not symmetric.

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The radius of the circle can be determined using the Pythagorean theorem. Since the chord is 5 units away from the center of the circle, a right triangle can be formed where one leg is half the length of the chord (5 units) and the hypotenuse is the radius of the circle. Using the Pythagorean theorem, we can solve for the radius as follows:

r^2 = (10/2)^2 + 5^2

r^2 = 25 + 25

r^2 = 50

r = sqrt(50) = 5sqrt(2) units

Therefore, the radius of the circle is 5sqrt(2) units.

To further explain, the Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. In this case, the chord is a line segment connecting two points on the circle and is perpendicular to the radius passing through the midpoint of the chord. Since the chord is 10 units long and 5 units away from the center of the circle, the length of one leg of the right triangle is 5 units (half the length of the chord), and the length of the other leg is the radius of the circle. Using the Pythagorean theorem, we can solve for the unknown length of the radius.

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Therefore,  The average current for each time interval is 0.066 A, 0.017 A, and 0.133 A respectively.

Explanation: To find the average current for a given time interval, we need to find the integral of the current function over that interval, and divide it by the length of the interval. Using the formula for the integral of a sinusoidal function, we can evaluate the integrals and find the average current for each time interval.
(a) For 0 ≤ t ≤ 1/60, the average current is 0.066 A.
(b) For 0 ≤ t ≤ 1/240, the average current is 0.017 A.
(c) For 0 ≤ t ≤ 1/30, the average current is 0.133 A.

Therefore,  The average current for each time interval is 0.066 A, 0.017 A, and 0.133 A respectively.

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