Page 809 - Algebra 1

*5. Multiple Choice $600 is invested at 11% simple interest. What is the value of (116) the investment after 14 years?
A $924 B $1524 C $2586.26 D $92,400
*6. Mutual Funds Over the past 20 years, a mutual fund averages paying (116) 10% interest compounded annually. If a woman had invested $3000
originally, how much would her account be worth now?
*7. Graph the cubic function y = -3x3. Use the graph to find the roots of the equation.
(115)
8. Error Analysis Two students write the equation “y equals x cubed plus
(115) five.” Which student is correct? Explain the error.
9. Geometry The formula for the volume of a cube is V = s3. Graph the (115) equation and find the volume of the cube if the side length is 2 units.
*10. Multi-Step The volume of a packing container is given by (115) the function y = x3 + 5.
a. Make a table of values for the equation. b. Graph the equation.
c. Find the volume when x is 3 feet.
11. Evaluate y = 3√ 7x + 2 - 7 for x = 2. (114)
12. Physics The speed at which an object in free fall drops is modeled by the (114) equation y = 8√x. In this equation, y is the speed in feet per second and
x is the distance fallen in feet. What is the speed of an apple after it falls a distance of 8 feet? Round to the nearest tenth.
*13. Error Analysis Two students are determining the domain and range of the (114) function f (x) = √ x - 5 + 1. Which student is correct? Explain the error.
Student A
y = x3 + 5
Student B
y = x2 + 5

Student A
f ( x ) = √ x - 5 + 1 x-4≥0
x ≥ 4; y ≥ 0
Student B
f ( x ) = √ x - 5 + 1 x-5≥0
x ≥ 5; y ≥ 1
Measurement The function s = √ A gives the side length of a square with area A. y ≥ _2 x - 4
3 4 14.
(114) What is the side length of a square that has an area of 625 square feet?
15. Graph the system 5 .
y≤0
16. Use the quadratic formula to solve 46 + 16x = -x2. Find approximate answers
(110) to four decimal places. 794 Saxon Algebra 1
(109)