2,218 Answered Questions for the topic Pre Calculus

Pre Calculus Mixture Problems

10/22/17

What amount of pure acid must be added to 300ml of a 50% acid solution to produce a 60% acid solution?
Pre calculus word problem
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Pre Calculus

10/20/17

write a quintic polynomial function with real coefficients in standard form that has 2+i with dual multiplicity and 3 as a root
write a quintic polynomial function with real coefficients in standard form that has 2+i with dual multiplicity and 3 as a root
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10/19/17

(tanθ+cotθ)^2=sec^2θ csc^2θ
Proving identities
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10/14/17

Pre-Calc Help!
The spreag from of oil leaking from a tanker is in the shape of a circle. If the radius r (in feet) of the spread after t hours is r(t) = 200sqt(t), find the area A of the oil slick as a function... more
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Pre Calculus Calculus

10/12/17

Determine whether the statement is true or false. Justify your answer. If f(x)=x+1 and g(x)=6x, then (f o g)(x)=(g o f)(x).
List why it is true or false and give each step, also include why each step was taken. 
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Pre Calculus Calculus

10/12/17

Find the coordinates of another point on the graph of the function f if the point (2a, 2c) is on the graph of f and the function f is even. Explain why.
List each step by step and explain why each step was take. 
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Pre Calculus Precalculus

10/09/17

Pre-calc please help
A college decides to build a soccer field and a basketball complex side by side with a fence surrounding thefields and a shared fence between the two fields. The college has purchased 2300ft of... more
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Pre Calculus Pre Cal Pre Calc

10/08/17

Is C=2pi(r) a power function?
Is C=2Πr an example of a power function? If so can you state the power and constant of variation, and state it in the form of f(x)=k*x^a?
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10/06/17

Find the derivative of the function and evaluate the derivative at the given value of a.
h(x)=xsquare root of x;a=16   d/dx=xsquare root of x=xsquare root of x(2+lnx/2square root of x)   Evaluate the derivative at the given value of a.   h'(a)=?      
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Pre Calculus

10/06/17

At the beginning of an environmental study, a forest covered an area of 1500km2 . Since then, this area has decreased by 5.1% each year. Let t be the num
At the beginning of an environmental study, a forest covered an area of 1500km2. Since then, this area has decreased by 5.1% each year.Let t be the number of years since the start of the study. Let... more
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Pre Calculus

10/04/17

interest at two different rates
If Ben invests $4,000 at 4% interest per year how much additional money must he invest at 5.5% annual interest to ensure that the interest he receives each year is 4.5% of the total amount invested
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Pre Calculus

10/04/17

Eliminating parameter to find a cartesian equation and sketching the curve
x=sin(1/2)thetha , y=cos(1/2)thetha , -pi≤thetha≤pi    What does the the negative interval mean ? And what does it mean when the angle is half ? 
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10/03/17

a manufacturer of calculators has found thet the price they charge (p) and the number they sell (n) of a cerain model is related by the equation n=-150p+2100
A) Write the revenue equation as a function of price B) Find the price they should charge to maximize revenue C) How many will they sell at that price? D) What is the maximum revenue?
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Pre Calculus Pre Cal

09/28/17

F(x)=x^2+9 find the value of the function
I really want to understand what I am doing during class
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Pre Calculus Precalculus

09/20/17

Math please help
f(x)=3x-2 and g(x)=x^2+3x+1 (gof)(x)
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Pre Calculus Precalculus

09/20/17

Answer the function
i really do not understand how to do this at all. f(x)={(x+1, x<-2),(5, -2<=x<=3), (x^2, x>3):} A: Sketch the function B: Evaluate f(5) C: Evaluate f(3)    
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Pre Calculus Pre Calc

09/17/17

If a ball is thrown into the air with a velocity of 40 ft/ sec it's height in feet t seconds later is given by y=40t-16t^2
Find the average velocity for the time period beginning when t=2 and lasting  I) 0.5 seconds ii) 0.1 second iii) 0.05 iv) 0.01
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Pre Calculus

09/14/17

is it possible to have |a| = -a for a nonzero real number a? Explain and give an example.
Please give step by step in words like you would to a class and give examples. Thank You!
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Pre Calculus

09/14/17

is it possible to have |a|=-a for a nonzero real number a? explain and give an example.
is it possible to have |a|=-a for a nonzero real number a? explain and give an example.
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Pre Calculus Calculus

09/14/17

Find the equation of the line tangent to the circle x^2+y^2=36 at point (11,5)
Final answer should be in General equation of the line   ?x+?y-?=0 ? means unknown.
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09/13/17

consider the function f(x)=3x^2-x/x^2-6x+5
List any vertical asymptotes of f(x), and explain, using limits, why each is a vertical asymptote. List any horizontal asymptotes of f(x), and explain, using limits, why each is a vertical... more
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Pre Calculus

09/12/17

The area, A=f(d) in2, of a circular pizza is a function of the diameter d, in inches. A package of pepperoni costs $1.64 and covers 250 square inches of pizza.
The area, A=f(d) in2, of a circular pizza is a function of the diameter d, in inches. A package of pepperoni costs $1.64 and covers 250 square inches of pizza.
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Pre Calculus

09/08/17

Determine how many mosquitos were in the area.
The recent opening of a landfill in the area has caused the raccoon population to flourish, with an adverse effect on the number of purple martins (type of bird). Wildlife specialists believe the... more
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Pre Calculus

08/23/17

One third of some number increased by 15 15 is 5 5 times the number.
Hi, this completely confuses me, anyone?
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Pre Calculus

08/21/17

If f(x)=x^2 and g(x)= square root (x), then (g o f)(x) =
I also want to know if I put the + or - sign in my final answer 
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