a new cell phone is introduced into the market. it is predicted that sales will grow logistically. the manufacturer estimates that they can sell a maximum of 100 thousand cell phones.after 28 thousand cell phones have been sold, sales are increasing by 10 thousand phones per month.find the differential equation describing the cell phone sales, where y(t) is the number of cell phones (in thousands) sold after t months.

Answers

Answer 1

The differential equation describing the cell phone sales is [tex]\frac{{dy}}{{dt}} = 0.5357 \cdot y(t) \cdot \left(1 - \frac{{y(t)}}{{100}}\right)[/tex].

Based on the given information, the cell phone sales growth is logistic, with a carrying capacity of 100 thousand units. When 28 thousand cell phones have been sold, the rate of sales increase is 10 thousand units per month.

The logistic growth differential equation is given by:

[tex]\frac{dy}{dt} = k \cdot y(t) \cdot \left(1 - \frac{y(t)}{M}\right)[/tex]

where dy/dt is the rate of change in sales, y(t) is the number of cell phones sold after t months, k is the growth rate, and M is the carrying capacity.

In this case, y(t) = 28, dy/dt = 10, and M = 100. To find k, we can plug these values into the equation:

10 = [tex]$k \cdot 28 \cdot \left(1 - \frac{28}{100}\right)$[/tex]

Solving for k:

k ≈ 0.5357

Therefore, the differential equation describing the cell phone sales is:

[tex]\frac{{dy}}{{dt}} = 0.5357 \cdot y(t) \cdot \left(1 - \frac{{y(t)}}{{100}}\right)[/tex]

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Related Questions

To get to her hotel, Nora has to take the correct exit on a roundabout that has a diameter of 22 yards. What is the roundabout's radius?

Answers

The answer is 11. You just divide the diameter by 2 to get the radius!!

180 billion cans to tons if there is 60,000 cans in 1 ton

Answers

Answer:     3 million

Step-by-step explanation:

180 divided by 60 equals 3 so that would be 3 million because there are only 60 thousand and that would be a million because it would not be a billion.

is (x + 1) a factor of x² + x³ + x + 1

Explanation please

Answers

To determine whether (x + 1) is a factor of x² + x³ + x + 1, we can use synthetic division or long division to divide x² + x³ + x + 1 by x + 1.

Using synthetic division, we can write:

-1 | 1 1 0 1
| -1 0 -0
| ___________
| 1 0 0 1

Since the remainder is not zero, we can conclude that (x + 1) is not a factor of x² + x³ + x + 1.

A food truck's revenue from the sale of Lacos and burritos is estimated to be R(t,b) dollars when t tacos and b burritos are sold. The following values are known. R(20.15) = 150 Rt,(20,15)= 3 Rb(20,15)=6 a. Estimate the food truck's revenue when 4 fewer burritos are sold. Selex b. How many tacos would the food truck need to sell to compensate for the decrease in burrito sales if the revenue is to remain at $150 Select

Answers

a. The new revenue can be estimated as R(20,11) = 150 - 24 = $126.

b. The food truck would need to sell 20 + 8 = 28 tacos to compensate for the decrease in burrito sales and keep the revenue at $150.

a. To estimate the food truck's revenue when 4 fewer burritos are sold, we can use the given information. We know that Rb(20,15) = 6, which means that the revenue changes by $6 for every additional burrito sold. If 4 fewer burritos are sold, the change in revenue would be 4 * (-6) = -$24.
b. To maintain a revenue of $150 despite selling 4 fewer burritos, we need to find out how many more tacos must be sold. We know that Rt(20,15) = 3, meaning the revenue changes by $3 for every additional taco sold. Since the loss in revenue due to selling 4 fewer burritos is $24, we need to sell enough tacos to make up for this loss. So, 24/3 = 8 more tacos need to be sold.

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each entry in the multiplication table above is an integer that is either positive, negative, or zero. what is the value of a ?

Answers

In summary, statement 1+2 is correct as it provides information about both c and a, while statement 1 alone and statement 2 alone are not sufficient to determine the value of a.

Statement 1+2: The first statement states that the value of c is not equal to zero, and for these values of c, a is always 1. The second statement states that h is equal to b*c, and since h is not equal to zero, neither b nor c can be zero. This means that statement 1+2 is correct, as it provides information about both c and a.

Statement 1: This statement provides information about the value of c, but it doesn't say anything about a. It states that h is equal to b*c and that h is not equal to zero, which means that neither b nor c can be zero. However, this information alone is not sufficient to determine the value of a.

Statement 2: This statement provides information about the relationship between a, c, and f. It states that c is equal to f, and a*c is equal to f. This expression can hold if c=f=0, but a can have any value. Additionally, if c and f are any non-zero value, a is always 1. This means that statement 2 alone is not sufficient to determine the value of a.

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there are only red and blue cards in a box. the probability of choosing a red card in the box at random is one third. if there are 24 blue cards, how many cards are in a box?

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There are 36 cards in the box.  In this scenario, we are given that the probability of choosing a red card from a box is one-third. We also know that there are 24 blue cards in the box. Our goal is to find the total number of cards in the box.

Let's use the concept of probability to solve this problem. The probability of an event is defined as the ratio of the number of favorable outcomes to the total number of possible outcomes. In this case, the probability of choosing a red card is given as 1/3, and the favorable outcome is selecting a red card. Let R be the number of red cards, and T be the total number of cards in the box. The probability formula can be represented as:

Probability of choosing a red card = R / T

We are given that the probability of choosing a red card is 1/3:

1/3 = R / T

Since there are 24 blue cards in the box, we can represent the total number of cards as the sum of red and blue cards:

T = R + 24

Now, we can solve the system of equations to find the values of R and T:

1. 1/3 = R / T
2. T = R + 24

From equation 1, we can express R as:

R = (1/3) * T

Substitute this expression for R in equation 2:

T = (1/3) * T + 24

Multiplying both sides by 3 to eliminate the fraction, we get:

3T = T + 72

Subtracting T from both sides:

2T = 72

Now, divide by 2 to find the total number of cards, T:

T = 36

So, there are 36 cards in the box.

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The diameter of a circular cookie cake is 16 inches. How many square inches make up half of the cookie cake? Approximate using π = 3.14.

100.48 square inches
200.96 square inches
401.92 square inches
803.84 square inches

Answers

There are 200.96 square inches that make up half of the cookie cake.

We have to given that;

The diameter of a circular cookie cake is 16 inches.

Now, We know that;

Area of circle = πr²

Here, Diameter = 16 inches

Hence, Radius = 16 / 2

                       = 8 in

Thus, Area of circular cookie cake is,

⇒ A = πr²

⇒ A = 3.14 × 8²

⇒ A = 200.96 inches²

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Two more than the quotient of a number and 8 is equal to 4

Answers

The number that is two more than the quotient of a number and is equal to 4 is 16. Let's break down the sentence into a numerical condition:

"Two more than the remainder of a number and 8" can be spoken to as (x/8) + 2, where x is the number we are attempting to discover.

The sentence moreover states that this expression is "equal to 4", so we are able to type in

(x/8) + 2 = 4

To fathom for x, we will confine the variable on one side of the condition. We will start by subtracting 2 from both sides:

(x/8) = 4 - 2

Streamlining the right-hand side gives:

(x/8) = 2

At long last, we are able to illuminate for x by increasing both sides by 8:

x = 2 x 8

x = 16

thus, the number we are seeking out is 16.

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complete question: What is the number which is two more than the quotient of a number and 8 is equal to 4?

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what is the daily inpatient census for july 16 if the census at midnight for july 15 was 239 and there were 59 discharges, 67 admissions, and 24 a

Answers

The daily inpatient census for July 16 is 271.

To determine the daily inpatient census for July 16, we need to take into account the census at midnight on July 15, the number of discharges, admissions, and additional patients (content loaded) throughout the day on July 15 and July 16.

Starting with the census at midnight on July 15 of 239, we subtract the number of discharges (59) and add the number of admissions (67) and additional patients (24) to get the total number of patients in the hospital on July 16.

239 - 59 + 67 + 24 = 271

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Find the measure of the missing angle. Round to the nearest degree.

Answers

The measure of the missing angle is38 degrees.

What is the measure of the missing angle?

The figure in the image is a right triangle.

Missing angle θ = ?

Hypotenuse = 55

Opposite to angle θ = 34

To find the missing angle, we use the trigonometric ratio.

sine = opposite / hypotenuse

Plug in the given values and solve for the missing angle.

sinθ = 34/55

Take the sine inverse

θ = sin⁻¹( 34/55 )

θ = 38⁰

Therefore, the angle is 38 degrees.

Option A) 38⁰ is the correct answer.

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A square tile has a width of 1/4 foot how many tiles will fit end to end along a 4 food wall?

Answers

Answer:

16 tiles

Step-by-step explanation:

10. Mrs. Johnson plans to cut a 6 foot (ft) board into pieces
3
that are ft long, as shown in the diagram below.
6 ft-
How many pieces can she get from this board?
A 9 pieces
B 8 pieces
6
pieces
D 4 pieces
M/J
4

Answers

There is 20 students in her class.

Here, we have,

3/10= size of slice;

we can get 3 slices from one pizza.

There are 6 pizzas..... 3x6=18;

there will be a remained of 1/10 from each pizza

because 3/10 is not an even number.

Now u would have (6) 1/10's.... So 1/10+1/10+1/10= 3/10 and 1/10+1/10+1/10=3/10.....

That makes two more slices for two more students......

18+2=20 slices for 20 kids in the class.

Hence, There is 20 students in her class.

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Mr. Henderson's gross income this month equals his gross income for last month. Mr. Henderson's net income this month is less than his net income last month. Which could explain the change in Mr. Henderson's net income?

Answers

Increase in taxes is one of the reasons why the change in Mr. Henderson's net income

Reasons for the change in net income

It is possible that Mr. Henderson's net income has decreased this month despite having received the same gross income as last month. Let us examine some of the plausible rationales behind it:

An increase in taxes: If Mr. Henderson worked more hours or obtained a raise, his gross income would be higher. However, if he now belongs to a higher tax bracket, he will owe more money in taxes and therefore have lower net income.

A change in deductions: It is likely that Mr. Henderson's employer may have modified his paycheck deductions which can lead to more taxes being held back from his earnings - an eventuality that could cause his net income to decrease.

Alterations in benefits: Changes in Mr. Henderson's approved employee benefits plan- insurance premiums increasing or retirement savings contributions stalling, for instance- could also explain why his net income reduced this month.

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HELP FAST!!!
BEST ANSWER GETS BRAINLIEST
Explain why and how you got the answer too!!

Answers

Answer: D

Step-by-step explanation:

If something is to the power of it means multiply the fractions.

since all inside the parenthesis is being multiplied you can distribute that exponent

[tex](64h^{16} x^{4} )^{\frac{1}{2} }[/tex]            

[tex]64^{\frac{1}{2} } h^{16(\frac{1}{2}) } x^{4(\frac{1}{2} )} }[/tex]          reduce fraction in exponents

[tex]64^{\frac{1}{2} } h^{8 } x^{2} }[/tex]                now for the 64^1/2   than means take the square root

[tex]8 h^{8 } x^{2} }[/tex]                   fractions are actually roots

Sorry x is k in question.

30 divided by cos 40

Answers

Answer:

22.98133...

Step-by-step explanation:

30 x cos(40°)

then refine to a decimal form

The formula for the force between two objects is , where M and m are the masses of the two objects, G is a constant, and r is the distance between them. Solve the formula for m.

Answers

The solution of the formula for the variable, m as required to be determined is; m = Fr² / GM.

What is the solution of the formula for variable m?

It follows from the task content that the complete question indicates a formula;

F = GMm / r²

Hence, to solve for the variable m; multiply both sides by r² so that we have;

Fr² = GMm

Finally divide both sides by GM so that we have;

m = Fr² / GM

Ultimately, the formula with m as the subject is; m = Fr² / GM.

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PLSSSS HELP IF YOU TRULY KNOW THISS

Answers

The answer resulted in x = 5 after the operation as the picture suggests, hope this helps

You wish to test the following claim(Ha )at a significance level of α=0.05
H o :μ 1 =μ 2
​H a :μ 1 <μ 2

​You obtain a sample of size n1 =6 with a mean of x1 =72.9 and a standard deviation ofs 1=5.9 from the first population. You obtain a sample of size n 2=7
with a mean of xˉ =75.1
and a standard deviation of s 2=5.6
from the second population. Find a confidence interval for the difference of the population means. For this calculation, use the conservative under-estimate for the degrees of freedom as mentioned in the textbook. (Report answer accurate to three decimal places.) confidence interval
=
The test statistic is... the confidence interval contains zero all values in the confidence interval are below zero all values in the confidence interval are above zero This test statistic leads to a decision to... reject the null accept the null fail to reject the null As such, the final conclusion is that... There is sufficient evidence to warrant rejection of the claim that the first population mean is less than the second population mean. There is not sufficient evidence to warrant rejection of the claim that the first population mean is less than the second population mean. The sample data support the claim that the first population mean is less than the second population mean. There is not sufficient sample evidence to support the claim that the first population mean is less than the second population mean.

Answers

The pooled standard deviatio is 5.746. We can say with 95% confidence that the true difference between the population means falls between -4.019 and 0.719.

First, we need to calculate the pooled standard deviation:

s_p = sqrt(((n1-1)*s1^2 + (n2-1)*s2^2)/(n1+n2-2))

s_p = sqrt(((6-1)*5.9^2 + (7-1)*5.6^2)/(6+7-2))

s_p = 5.746

Next, we can calculate the t-statistic:

t = ((x1 - x2) - 0) / (s_p * sqrt(1/n1 + 1/n2))

t = ((72.9 - 75.1) - 0) / (5.746 * sqrt(1/6 + 1/7))

t = -0.956

Using a t-distribution table with conservative degrees of freedom (df = min(n1-1, n2-1) = 5), we find that the critical value for a one-tailed test with α=0.05 is -1.833. Since our calculated t-statistic is greater than the critical value, we fail to reject the null hypothesis.

Therefore, we cannot conclude that there is sufficient evidence to support the claim that the first population mean is less than the second population mean.

As for the confidence interval, we can use the formula:

(x1 - x2) ± t_(α/2, df) * s_p * sqrt(1/n1 + 1/n2)

Plugging in the values:

(72.9 - 75.1) ± t_(0.025, 5) * 5.746 * sqrt(1/6 + 1/7)

-4.019 < μ1 - μ2 < 0.719

Therefore, we can say with 95% confidence that the true difference between the population means falls between -4.019 and 0.719.

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Hector flips a fair coin, then rolls a standard number cube. What's the theoretical probability of flipping heads, then rolling a 1 or 2?

The probability of flipping heads, then rolling a 1 or 2 is
fraction form

Answers

The theoretical probability of flipping heads and rolling a 1 or 2 is 1/6.

Now, We have;

The sample space for flipping a coin and rolling a number cube are:

Flipping a coin: {H, T}

There are 2 possible outcomes, since the coin is fair.

Rolling a number cube: {1, 2, 3, 4, 5, 6}

Since, There are 6 possible outcomes, since the number cube is standard

So, the total number of outcomes for the combined experiment is,

2 x 6 = 12.

The events of flipping heads and rolling a 1 or a 2 are independent,

Hence, The probability of flipping heads is,

⇒ 1/2,

And, The probability of rolling a 1 or 2 is,

⇒ 2/6,

So, the probability of flipping heads and rolling a 1 or 2 is;

= (1/2) x (2/6)

= 1/6

Therefore, the theoretical probability of flipping heads and rolling a 1 or 2 is 1/6.

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In how many ways can 8 distinguishable rooks be placed on an 8 × 8 chessboard so that none can capture any other, namely no row and no column contains more than one rook? For example, in a 2 × 2 chessboard, you can place 2 rooks labled 'a, and 'b' in 4 ways. There are 4 locations to place'a', and that location determines the location of b'. 40320 40320

Answers

In order to place 8 distinguishable rooks on an 8x8 chessboard without any of them being able to capture each other, you will need to ensure that each rook occupies a unique row and column.

Step 1: Place the first rook. There are 8 different locations to choose from (one in each row).
Step 2: Place the second rook. There are 7 remaining locations to choose from, as you cannot place it in the same row or column as the first rook.
Step 3: Place the third rook. There are 6 remaining locations to choose from, avoiding the rows and columns of the first two rooks.
Step 4: Continue this process until all 8 rooks have been placed.

To find the total number of ways to place the 8 distinguishable rooks, multiply the number of choices for each step:

8 (choices for rook 1) * 7 (choices for rook 2) * 6 (choices for rook 3) * 5 (choices for rook 4) * 4 (choices for rook 5) * 3 (choices for rook 6) * 2 (choices for rook 7) * 1 (choice for rook 8) = 40,320 ways.

To solve this problem, we can use the principle of multiplication. We start by placing the first rook in any of the 64 squares on the chessboard. There are 64 choices for the first rook.

Next, we need to place the second rook in a location that is not attacked by the first rook. Since rooks can attack any square in the same row or column as them, we need to choose a square that is not in the same row or column as the first rook. There are 7 rows and 7 columns remaining, so there are 14 squares in which the second rook can be placed.

For the third rook, we need to choose a location that is not attacked by either the first or second rook. This means we need to choose a square that is not in the same row or column as the first two rooks. There are 6 rows and 6 columns remaining, so there are 12 squares in which the third rook can be placed.

Continuing in this way, we see that the number of choices for the nth rook is equal to the number of rows and columns remaining after the (n-1)th rook has been placed. So, the total number of ways to place all 8 rooks on the chessboard is:

64 × 14 × 12 × 10 × 8 × 6 × 4 × 2 = 16,777,216

Therefore, there are 16,777,216 ways to place 8 distinguishable rooks on an 8 × 8 chessboard so that none can capture any other.

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Reduce to simplest form.

7
8
+
(

1
2
)
=

8
7

+(−
2
1

)=minus, start fraction, 7, divided by, 8, end fraction, plus, left parenthesis, minus, start fraction, 1, divided by, 2, end fraction, right parenthesis, equals

Answers

Answer: -1/3-(-3/5)=4/15

Step-by-step explanation:

P.S i'm emo

An equivalent form for a conditional statement is obtained by reversing and negating the antecedent and consequent. true or false

Answers

False. The statement you described is not an equivalent form for a conditional statement. The process you mentioned, which is reversing and negating the antecedent and consequent, is known as forming the contrapositive of the statement.



A conditional statement has the form "If P, then Q," where P is the antecedent and Q is the consequent. The contrapositive is formed by negating both the antecedent and consequent, and reversing their order: "If not Q, then not P." The contrapositive is equivalent to the original conditional statement.

However, simply reversing the antecedent and consequent without negating them gives you the converse, which is "If Q, then P." The converse is not equivalent to the original conditional statement.

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estimates its sales at 200,000 units in the first quarter and that sales will increase by 20,000 units each quarter over the year. they have, and desire, a 25% ending inventory of finished goods. each unit sells for $35. of the sales are for cash. 70% of the credit customers pay within the quarter. the remainder is received in the quarter following sale.

Answers

Based on the given information, the company estimates its sales to be 200,000 units in the first quarter. Assuming a 20,000 unit increase each quarter over the year, the second quarter's sales would be 220,000 units, the third quarter's sales would be 240,000 units, and the fourth quarter's sales would be 260,000 units.

To calculate the desired ending inventory of finished goods, we take 25% of the expected sales for the next quarter. For example, to determine the desired ending inventory for the first quarter, we take 25% of 220,000 units (the expected sales for the second quarter), which equals 55,000 units.

Each unit sells for $35, so the total sales revenue for the first quarter would be 200,000 units x $35 = $7,000,000.

Of the sales, 70% are for cash, so the company would receive $4,900,000 in cash for the first quarter's sales. The remaining 30% of sales are credit sales, and assuming that 70% of credit customers pay within the quarter, the company would receive an additional 21,000 units x $35 = $735,000 in the first quarter. The remainder of the credit sales, which is 30% x 30,000 units = 9,000 units, would be received in the following quarter.

Overall, the company expects to have increasing sales throughout the year and desires to maintain a 25% ending inventory of finished goods. The company also expects a mix of cash and credit sales, with 70% of credit customers paying within the quarter and the remainder paying in the following quarter.

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Determine which of the following are valid values for probability.
a) P(A) = 0.4 Valid or Invalid
b) P(B) = 7/3 Valid or Invalid
c) P(C) = 100 Valid or Invalid
d) P(A) = 4/5 Valid or Invalid
e) P(A) = 3.5 Valid or Invalid
f) P(B) = 20% Valid or Invalid
g) P(C) = 110% Valid or Invalid
h) P(A) = 0 Valid or Invalid​

Answers

The valid values for probability are: a) P(A) = 0.4, d) P(A) = 4/5, f) P(B) = 20% and h) P(A) = 0

Determining the valid values for probability.

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

List of options

The valid values for probability are any value between 0 and 1 (inclusive)

This means that numbers less than 0 or greater than 1 are invalid

using the above as a guide, we have the following:

a) P(A) = 0.4 Validb) P(B) = 7/3 Invalidc) P(C) = 100 Invalidd) P(A) = 4/5 Valide) P(A) = 3.5 Invalidf) P(B) = 20% Validg) P(C) = 110%  Invalidh) P(A) = 0 Valid

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Ready for More?


How can you show that a quadrilateral is a square with the fewest steps?

Answers

Answer:

Step-by-step explanation:

How can you show that a quadrilateral is a square with the fewest steps?

all 4 sides equalall interior angles equal 90°

#1Change from standard form to vertex formy= x²-8x+15

Answers

Therefore, the vector form of the equation y = x² - 8x + 15 is y = (x - 4)² + 14. The vertex of the parabola is at the point (4, 14).

To convert the quadratic equation y = x² - 8x + 15 from standard form to vertex form, we need to complete the square by adding and subtracting a constant term. Here's the step-by-step explanation:

Factor the coefficient of x²: The coefficient of x² is 1, so we don't need to factor it.

Group the x terms: Rewrite the quadratic equation as y = (x² - 8x) + 15.

Complete the square: To complete the square, we need to add and subtract a constant term that will make the expression inside the parentheses a perfect square trinomial. The constant we need to add is half of the coefficient of x, squared: (8/2)² = 16.

y = (x² - 8x + 16 - 16) + 15 // add and subtract 16

y = (x - 4)² - 1 + 15 // factor and simplify

Simplify: Now we can simplify the expression by combining the constants -1 and 15 to get 14.

y = (x - 4)² + 14

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Find x, and then any unknown angles in the quadrilateral.
X=
(Type a whole number)
M

M M M (All whole numbers)

Answers

The value of x in the quadrilateral is 20 degrees.

How to find the angles of a quadrilateral?

The sum of angles in a quadrilateral is 360 degrees. Therefore, a quadrilateral is a closed shape and a type of polygon that has four sides, four vertices and four angle.

Hence, let's find the value of x in the quadrilateral.

x + x + 32 + 8x - 16 + 8x - 16  = 360

2x + 16x + 32 - 32 = 360

18x + 0 = 360

18x = 360

18x = 360

divide both sides by 18

x = 360 / 18

x = 20

Therefore,

x = 20 degrees

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A random variable is a measurement to be taken in a probability experiment. an observed value of a random variable is the measurement that has been taken. a discrete random variable is a random variable in which there is a countable collection of possible observed values. that is:___________

Answers

The possible observed values of a discrete random variable can be listed in a countable collection. A random variable is a measurement to be taken in a probability experiment.

An observed value of a random variable is the measurement that has been taken. A discrete random variable is a random variable in which there is a countable collection of possible observed values. That is, the discrete random variable can only take on specific values within a given range, and the probability associated with each value can be calculated. This countable collection of possible observed values is finite or countably infinite, and the probabilities sum up to 1.

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A cloth sack contains 25 red beads, 75 green beads, and 50 blue beads. If a single bead is drawn at random, what is the probability that it will be BLUE?

Answers

The probability that the drawn bead will be blue is 1/3.

Given that,

A cloth sack contains 25 red beads, 75 green beads, and 50 blue beads.

Total number of beads in the sack = 25 + 75 + 50 = 150

Number of blue beads = 50

Probability of drawing a blue bead = Number of blue beads / Total number of beads

= 50/150

= 1/3

Hence the required probability of drawing blue bead is 1/3.

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Find the slope of a line perpendicular to the line whose equation is
3x−3y=63. Fully simplify your answer.

Answers

The slope of perpendicular line is -1.

We have,

Equation: 3x - 3y = 63

Now, writing the given equation in slope intercept form

3y= 3x- 63

y= 3x/ 3 - 63/3

y= x - 21

So, the slope of given equation is 1.

Now, the slope of two perpendicular line have the product -1.

let the slope of perpendicular line be m.

So, m x 1 = -1

m = -1

Thus, the slope of perpendicular line is -1.

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