477 Answered Questions for the topic Precalculus Homework

Precalculus Homework Logs

03/12/15

Half life question
Analysis indicated that a scroll wrapping contained 76% of the original carbon-14. The half life of carbon-14 is 5715 years. Set up & solve equation to find age
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03/10/15

Exponential and logarithmic function
Logistic Growth unrestricted growth because of limited habitat and food sup- plies. Under such conditions the population follows a logistic growth model:p(t)=d/1+ke^-ctwhere c, d, and k are... more
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Precalculus Homework

03/09/15

Composition of Functions
Find f(x+h)-f(x)/h for f(x)=2x^2 + 3x   The answer is 4x + 3 + 2h, but I don't know how to arrive at it. I've been always baffled by this type of problem. 
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Precalculus Homework Pre Calculus Please Answer!! Urgent!

03/09/15

Exponential and logarithmic functions
Carbon Dating The age of an ancient artifact can be determined by the amount of radioactive carbon-14 remaining in it. If D0 is the original amount of carbon-14 and D is the amount remaining, then... more
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Precalculus Homework

03/09/15

Question about inverse function for pre-calculus
Determine whether f(x)= √x+8 has an inverse function. If it does, find the inverse function and state any restrictions on its domain. I already figured it does have an inverse function using the... more
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03/09/15

the neutral exponential function
Radioactive Decay A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t)= 13e^-0.015t where m(t) is measured in kilograms. (a)... more
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Precalculus Homework

03/09/15

how do I solve for vectors if v=6i-5j and w =2i+3j and given v=4i+j and w=3i+4j? how do I solve?
how do I solve for vectors if v=6i-5j and w =2i+3j and given v=4i+j and w=3i+4j? how do I solve?
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03/07/15

Solve using logarithmic
given: populations of 2 towns Springfield: f(t)=200(2)^t/3shelbyville:g(t)=500(1/4)^t/5when will springfeikd and shelbyville have the same populatio? What is that population? With explaintion and... more
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Precalculus Homework Precalculus

02/23/15

Sketch two complete cycles of the graph, then answer the question about the function. How is the graph related to its parent graph y=sinx or y=cosx
1) y=5 sin2x 2)y=3 cos(x/2) 3)y=2 sin(2Πx)+1  
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Precalculus Homework Precalculus

02/23/15

Sketch the graph of each function, showing two complete cycles between [-2pi,2pi]. label the x-coordinates of any zeros or asymptotes
1) y=cosx 2)y=tanx 3)y=sinx 4)y=cscx
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Precalculus Homework Help With Word Problem

02/10/15

Word problem need help please
A baseball team plays in a stadium that holds 55,000 spectators. With the ticket price at $10, the average attendance at recent games has been 27,000. A market survey indicates that for every... more
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Precalculus Homework

02/10/15

Find the area of the triangle PQR where P, Q, and R are points on the unit circle located at angles p/3, p, and 7 p/4 respectively.
Find the area of the triangle PQR where P, Q, and R are points on the unit circle located at angles π/3, π, and 7 π/4 respectively.
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Precalculus Homework

02/10/15

find all solutions on the interval (0,2p) by first multiplying to rid the denominator, and then squaring both sides. (sinx)/(1+cosx) =1
find all solutions on the interval (0,2π) by first multiplying to rid the denominator, and then squaring both sides.
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Precalculus Homework

02/10/15

Find the exact decimal of the coefficient x^6 y^6 in the expansion of (0.5x+0.5y^2)^9?
Find the exact decimal of the coefficient x^6 y^6 in the expansion of (0.5x+0.5y^2)^9?
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Precalculus Homework Precalculus Word Problem

02/05/15

Find the distance
A surveyor on one side of a river wants to find the distance between points A and B on the opposite side of the river. On her side, she chooses C and D, which are 20m apart, and measures angles;... more
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Precalculus Homework Precalculus Precalculus Honors

02/04/15

find the angle between vectors u and v. u= <-1,0> v= <0,2>.
Why is it that θ will be 90 and not 270
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Precalculus Homework

01/27/15

If x is the width of the page, find a function in the variable x, giving the area of the printed page.
A book has 1 inch margins at the top and bottom and .5  margins on the sides and an area of 50 inches squared.
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Precalculus Homework Word Problem Help

01/26/15

Why do I need to find a derivative? What exactly is a derivative?
Charlie Cardinal’s Athletic Boosters are buying popcorn. The vendor agreed to sell the Boosters a box filled with popcorn, provided that the box met the following requirements: Its length is 10 cm... more
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Precalculus Homework

01/26/15

You invested $6000 at 4.5% and 5.5% simple interest. During the first year, the two accounts earned $305. How much did you invest in each fund?
You invested $6000 at 4.5% and 5.5% simple interest. During the first year, the two accounts earned $305. How much did you invest in each fund? (Note: the 5.5% account is more risky.)
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Precalculus Homework Precalculus

01/25/15

Express the function F in the form f o g
Express the function F in the form f o g .  Use non-identity functions for f(x) and g(x).)   F(x) = (x − 6)8   (f(x), g(x)) = ?  
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Precalculus Homework Precalculus

01/25/15

Difference quotient question
Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ----------------         h, where h ≠ 0.   f(x) = x2 + 3     Find f(a)= f(a+h)= f(a + h) − f(a)       =----------------  ... more
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Precalculus Homework Precalculus Precalculus Honors

01/22/15

Annual Percentage Yield on an account paying 6% interest
Its compounded quarterly
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Precalculus Homework Precalculus Precalculus Honors

01/22/15

solve equation exactly (real numbers if possible, leave in logarithmic form if not)
[(4x-4-x)⁄3]=2 
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Precalculus Homework Precalculus Precalculus Honors

01/22/15

Solve each equation exactly (answer as real #, or leave in log form)
Log3(5x+2)-log9(16x2)=3 
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Precalculus Homework Precalculus

01/21/15

8^x+1 = 4•6^x
We have to solve it for a real number and if not we are supposed to leave it in logarithmic form 
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