1,063 Answered Questions for the topic Pre-Calculus

05/06/20

Suppose $7,500 is compounded monthly for 30 years. If no other deposits are made, what rate is needed for the balance to double in that time?
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05/06/20

Suppose $80,000 is invested into an account where interest is compounded annually. After 30 years the balance is $299,625. What was the interest rate as a percent?
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Pre Calculus Precalculus Pre Calculus

05/06/20

How much should be deposited in an account paying 3.5% interest, compounded monthly, in order to have a balance of $ 9,000 after 17 years and 3 months?
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05/06/20

A credit union client deposits $2,000 in an account earning 3% interest, compounded daily. What will the balance of the account be at the end of 22 years?
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05/06/20

A credit union client deposits $2,000 in an account earning 3% interest, compounded monthly. What will the balance of the account be at the end of 17 years?
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Pre Calculus Math Calculus Precalculus

05/04/20

Pre-cal help!! I don't understand why this particular problem errors.
In complete sentences, why entering “sin-12” in your calculator produces an error message.
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Pre Calculus

05/01/20

How to convert 𝑦^2=3−𝑥^2 from rectangular form to polar form?
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05/01/20

precalc question
Determine the angle needed for a sector whose perimeter is four times as big as the area.The radius of the sector is 3 feet.
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Pre Calculus Math Calculus Precalculus

04/30/20

I really need help with my homework. Thank you!
The graph of y = f ′(x), the derivative of f(x), is shown below. Given f(4) = 6, evaluate f(0).Options: 1)  -2 2)  2 3)  4 4)  10
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04/30/20

Precalc Question
Suppose Randall’s horse Ginger is walking around a circular track of radius 120 feet with an angular speed of 3 RPM clockwise. If she starts at the westernmost point of the track, give the... more
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Pre Calculus Calculus Trigonometry

04/21/20

trigonometry question
Find the solution set of each equation in the interval: 0 ≤ x < 2 : sin x + csc x – 2 = 0a. {0}b. {π/2, 3π/2}c. {0,π}d. π/2
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Pre Calculus

04/16/20

The rectangular coordinates of a point are given. Find polar coordinates of the point.
The rectangular coordinates of a point are given. Find polar coordinates of the point.(3,-3)
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Pre Calculus

04/16/20

Find the sum. 81 plus 76 plus 71 plus ... minus 364
Not really understanding this. I get 200 less then the actual answer. is it not x(n)=a+d(n-1)?
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Pre Calculus

04/06/20

Using slope to find radio transmitter signal

A small radio transmitter broadcasts in a 60 mile radius. If you drive along a straight line from a city 79 miles north of the transmitter to a second city 80 miles east of the transmitter, during... more
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Pre Calculus

04/05/20

Prove the identity
cos(−x)________ =sec(x)−tan(x)1−sin(−x)
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Pre Calculus Math Algebra

04/03/20

Give the growth rate (%) that corresponds to the growth factor 0.46?
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Pre Calculus Trigonometry

04/01/20

Given cot u=2/5, 0<u<pi/2 and cos v = -3/5, pi<v<3pi/2, find tan(u+v)
When there is a given, how do you plug that in to find an answer?
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Pre Calculus Precalculus Pre Calculus

03/31/20

Law of cosines precalc
Given the triangle below, find the measure of angle A. Picture is not drawn to scaleif side a =20 and the other 2 sides are 16 and 21. keep in mind that angle b and c are opposite of their sides.
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Pre Calculus Precalculus Pre Calculus

03/31/20

Half angle identities

If sin(x)=5/9, and x is in quadrant I, determine the exact value of each of the following. tan(x/2)=?I got sin(x/2)= sqrt((9-sqrt(56))/18) and cos(x/2)= sqrt((9+sqrt(56))/18) but I can't figure out... more
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Pre Calculus

03/30/20

A 10 foot ladder is leaning against a wall that is 4 ft away.

How tall is the ladder when it touched the wall?What is the angle measurement between the bottom of the ladder and floor?What is the angle measurement between the top of the ladder and the wall?How... more
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Pre Calculus

03/28/20

Find all angles θ between 0° and 180° satisfying the given equation cos(θ) = 4/7
Find all angles θ between 0° and 180° satisfying the given equation cos(θ) = 4/7
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Pre Calculus

03/27/20

Newton's Law of Cooling
​Newton's Law of Cooling says that the rate at which a body cools is proportional to the difference C in temperature between the body and the environment around it. The temperature​ f(t) of the... more
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Pre Calculus

03/20/20

determine the corresponding ordered pair of the point on the unit circle for the following angle: -13 pi/ 2
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Pre Calculus

03/19/20

In an arithmetic series, the sum of the first 12 terms is equal to ten times the sum of the first 3 terms. If the first term is 5, find the common difference and the sum of the first 20 terms
Please explain how you found the answer.
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03/19/20

Precalc Question (answer asap thanks)
A merry-go-round is rotating at the constant angular speed of 3 RPM counterclockwise. The platform of this ride is a circular disc of radius 24 feet. You jump onto the ride at the location pictured... more
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