915 Answered Questions for the topic Pre-Calculus

Pre Calculus Precalculus Pre Calculus

03/10/21

Solve each equation on the interval 0≤x<2π .

a) tan(x/2)=√3b) sin2x=√3/2

03/10/21

9.5.89: The total sales of a company​ (in millions of​ dollars) t months from now are given by S(t)=0.04t^3+0.8t^2+8t+7.

The total sales of a company​ (in millions of​ dollars) t months from now are given by S(t)=0.04t^3+0.8t^2+8t+7. ​(A) Find S′(t).​(B) Find ​S(6​) and S′(6) ​(to two decimal​ places).​(C) Interpret... more

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) = ____________
Pre Calculus Calculus

03/07/21

LAW OF SINES AND COSINES

The sailing club leaves the marina on a heading N15oE and sails for 18 miles. They then change course, and after traveling for 12 miles on a heading N35oE, they experience engine trouble and radio... more
Pre Calculus Math Calculus Precalculus

03/07/21

A Ferris wheel is....

A Ferris wheel is 15 meters in diameter and boarded from a platform that is 5 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel... more
Pre Calculus Precalculus Pre Calculus

02/24/21

Find the exact values of the other 5 trig functions if cos θ = -1/3, pi/2 < θ < pi

Find the exact values of the other 5 trig functions if cos θ = -1/3, pi/2 < θ < pi
Pre Calculus Precalculus

02/20/21

MATH HELP PLZ!!!

A​ sparkling-water distributor wants to make up 200 gal of sparkling water to sell for $5.00 per gallon. She wishes to mix three grades of water selling for $8.00, $3.00, and $4.50 per​ gallon,... more
Pre Calculus Precalculus

02/20/21

MATH HELP PLZ!!!

A rug cleaning company sells three models. EZ model weighs 10​ pounds, packed in a​ 10-cubic-foot box. Mini model weighs 20​ pounds, packed in an​ 8-cubic-foot box. Hefty model weighs 60​ pounds,... more
Pre Calculus Pre Calculus

02/11/21

Find f ∘ g and g ∘ f. f(x) = x3, g(x) = x2/3

(a)    f∘ g =(b)    g ∘ f=Find the domain of each function and each composite function. (Enter your answers using interval notation.)domain of f =domain of g =domain of f ∘ g =domain of g ∘ f =
Pre Calculus Algebra

02/07/21

Find the equation of a tangent line to the given curve at an x-coordinate.

I need to find the slope-intercept form of the tangent line that is formed when the curve of the equation y=x^3-2x-2 intersects with x=1
Pre Calculus Precalculus Pre Calculus

02/04/21

If f(x)=3x^2+4x+5, what must the value of k equal so that the graph of f(x-k) will be symmetric to the y-axis?

Choices:(a) -4(b) -4/3(c) -2/3(d) 2/3(e) 4/3
Pre Calculus Chemistry Precalculus

02/02/21

Help me plz!!!!

The​ half-life of a radioactive substance is 31.7 years.(a) Find the exponential decay model for this substance(b) How long will it take a sample of 400 grams to decay to 300 grams?(c) How much of... more
Pre Calculus Chemistry Precalculus

02/02/21

Plz help!!!!!!!

The amount of carbon 14 present in a paint after t years is given by A(t)=A0 e-0.00012t. The paint contains 32% of its carbon 14. Estimate the age of the paint. Round to the nearest year as needed.
Pre Calculus Chemistry Precalculus

02/02/21

Help plz!!!!!!!

The amount of​ carbon-14 present in animal bones after t years is given by A(t)=A0e-0.00012t. A sample of fossil had 26% of the carbon 14 of a contemporary living sample. Estimate the age of the... more
Pre Calculus Math Calculus Precalculus

01/29/21

I need help with integrals

Let f be the function given by f(x)=sin^2(x/4)e^(−x2). It is known that (top value= π/2)∫(bottom value=0) f(x) dx= 0.0223. If a midpoint Riemann sum with two intervals of equal length is used to... more
Pre Calculus Precalculus Pre Calculus

01/20/21

If f(x)= 4x - x^2, find f(x+h)-f(x-h)/2h

Pre Calculus

01/17/21

Rewrite with only sin x and cos x. cos x - sin 2x

These are the choices2 sin x cos2x + cos x2 sin x cos2x + sin3xsin x cos2x - sin3x + cos3xcos x - 2sin xcos x
Pre Calculus Math Calculus Precalculus

01/13/21

Is it possible to have a rational function with the following characteristics?

horizontal asymptote at y=1/3vertical asymptote at x=-4/3x intercept= (-1,0)y intercept= (0,3/4)hole at (1/2,3/11)
Pre Calculus

01/13/21

How do you do this pre-calculus question?

Find two function f and g such that f(g(x))=5/(x^2 −1)^3.

01/11/21

Write the standard form equation of the hyperbola given the following vertices and perimeter of central rectangle

Vertices (0,-1), (-20, -1)Perimeter of Central Rectangle = 72

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