179 Answered Questions for the topic Precalc

03/21/21

9.5: For ​f(x)=2x4−4x2+5 find the following. ​ (A) f′(x) ​(B) The slope of the graph of f at x=2 ​(C) The equation of the tangent line at x=2 ​(D) The​ value(s) of x where the tangent line is...

For ​f(x)=2x4−4x2+5 find the following.​(A) f′(x)​(B) The slope of the graph of f at x=2 ​(C) The equation of the tangent line at x=2 ​(D) The​ value(s) of x where the tangent line is horizontal

03/20/21

10.2: Find the equation of the line tangent to the graph of f at the indicated value of x. f(x)=10e^x+2x​; x=0 y= ________

Find the equation of the line tangent to the graph of f at the indicated value of x.f(x)=10e^x+2x​; x=0y= ________

03/10/21

If an object moves along the​ y-axis (marked in​ feet) so that its position at time x​ (in seconds) is given by f(x)=240x−16x^2​, find the following.

If an object moves along the​ y-axis (marked in​ feet) so that its position at time x​ (in seconds) is given by f(x)=240x−16x^2​, find the following.​(A) The instantaneous velocity function... more

03/10/21

The total cost​ (in dollars) of producing x food processors is ​C(x)=2200+70x−0.3x^2.

The total cost​ (in dollars) of producing x food processors is ​C(x)=2200+70x−0.3x^2.​(A) Find the exact cost of producing the 91st food processor.​(B) Use the marginal cost to approximate the... more

03/10/21

The total cost​ (in dollars) of producing x food processors is ​C(x)=2100+80x−0.5x^2.

The total cost​ (in dollars) of producing x food processors is ​C(x)=2100+80x−0.5x^2.​(A) Find the exact cost of producing the 41st food processor.​(B) Use the marginal cost to approximate the... more

03/10/21

Find the marginal average cost function if cost and revenue are given by ​C(x)=144+5.8x and R(x)=9x−0.07x^2.

Find the marginal average cost function if cost and revenue are given by ​C(x)=144+5.8x and R(x)=9x−0.07x^2.The marginal average cost function is C′(x)= ______________

03/10/21

Find the marginal profit function if cost and revenue are given by ​C(x)=224+0.8x and R(x)=6x−0.05x^2.

Find the marginal profit function if cost and revenue are given by ​C(x)=224+0.8x and R(x)=6x−0.05x^2.P′(x)= ________

03/10/21

Find the profit function if cost and revenue are given by ​C(x)=128+2.4x and R(x)=8x−0.03x^2

Find the profit function if cost and revenue are given by ​C(x)=128+2.4x and R(x)=8x−0.03x^2The profit function is ​P(x)= ________

03/10/21

Find the marginal revenue function.

Find the marginal revenue function.​R(x)=x(17−0.05x)R′(x)= _________

03/10/21

9.7.11 Find the marginal cost function

Find the marginal cost function.​C(x)=210+3.3x−0.07xC′(x) = ____________

02/17/21

Precalc exponential function

If f(x) = 3x – 2, find the exponential function which passes through f(6) and f(20). Round to the nearestthousandth.How do you do this question?? Do you use logs?

02/12/21

Solve the equation. Round to 4 decimal places when necessary.

(1/9)^k ⋅ 27^k+4 = (1/81)^3-k

02/12/21

PRE CALC AB - A new app was downloaded 175 times in its first week. Since then, the number of downloads increased by 16.5% each week.

A new app was downloaded 175 times in its first week. Since then, the number of downloads increased by 16.5% each week. a) Write a continuous exponential growth model to approximate the number of... more

02/12/21

PRE CALC AB - Kale invested $1,500 in an account with an interest rate of 6.5%.

Kale invested $1,500 in an account with an interest rate of 6.5%.  a) Write an exponential equation to find the account balance in t years if the interest is compounded monthly? b) What will be the... more

01/06/21

sin (theta+48°) = cos 2theta. What is the second step to find theta? What does theta equal?

Any help with this would be greatly appreciated.

12/17/20

Explain why that is false. Find the annual interest rate compounded monthly that is actually being charged for financing ​$17,475 with 72 monthly payments of ​$299.

The ad for a​ 4-door sedan claims that a monthly payment of ​$299 constitutes​ 0% financing. Explain why that is false. Find the annual interest rate compounded monthly that is actually being... more

12/17/20

If payments are made at the end of each​ period, how much money will be in the account in 6 ​years?

In order to accumulate enough money for a down payment on a​ house, a couple deposits $254 per month into an account paying 6% compounded monthly. If payments are made at the end of each​ period,... more

12/15/20

The principal P is borrowed and the​ loan's future value A at time t is given. Determine the​ loan's simple interest rate r to the nearest tenth of a percent.

The principal P is borrowed and the​ loan's future value A at time t is given. Determine the​ loan's simple interest rate r to the nearest tenth of a percent.P​ = ​$2300.00​, A​ = ​$2328.75​, t​ =... more

12/15/20

You can afford monthly deposits of $250 into an account that pays 2.7% compounded monthly. How long will it be until you have $10,000 to buy a​ boat?

You can afford monthly deposits of $250 into an account that pays 2.7% compounded monthly. How long will it be until you have $10,000 to buy a​ boat?Type the number of​ months: ___________​(Round... more

12/15/20

. Find the probability that the spinner lands on blue. Find the number of elements in event​ E, n(E), and the total number of outcomes in the sample​ space, n(S).

A circular spinner is divided into 9 sectors of equal area. There are 2 red​ sectors, 3 ​blue, 3 ​yellow, and 1 green. Consider the experiment of spinning the spinner once. Find the probability... more

12/15/20

An experiment consists of drawing 1 card from a standard​ 52-card deck. What is the probability of drawing a black card​?

An experiment consists of drawing 1 card from a standard​ 52-card deck. What is the probability of drawing a black card​? Find the number of elements in event​ E, n(E), and the total number of... more

12/15/20

In a family with 5 ​children, excluding multiple​ births, what is the probability of having 5 girls​? Assume that a girl is as likely as a boy at each birth.

In a family with 5 ​children, excluding multiple​ births, what is the probability of having 5 girls​? Assume that a girl is as likely as a boy at each birth.Find the number of elements in event​ E,... more

12/15/20

Find and simplify the expression if f(x)=x2−3. ​f(2+​h)

Find and simplify the expression if f(x)=x2−3.​f(2+​h)​f(2+​h)= _______ ​(Simplify your answer. Do not​ factor.)

12/15/20

Using the formula for simple interest and the given​ values, find I.

Using the formula for simple interest and the given​ values, find I.P=$300​; r=8%​; t=7 years​; I=​?

12/14/20

Find and simplify the expression if f(x)=x2−4. ​f(7+​h)

Find and simplify the expression if f(x)=x2−4.​f(7+​h)​f(7+​h)= _________​(Simplify your answer. Do not​ factor.)

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