x
y
0 1 2 3 456
20
40
60
80
100
120
140
Chapter 5_ Sample Exam
Please answer all the questions and show work where appropriate.
1. Simplify:
3
2
3
3
2โ
โ
โ
โ
โ
โ
โ
โ
y
x
2. Simplify: 343 )5( โโ zxy
3. Given 923)( 2โ+โ= xxxf find )2(
โ
f.
4. Add: )775()923( 22 +โโ+โ+ xxxx
5. Subtract: )532()435( 22 โโโ+โโ xxxx
6. Multiply: )1523(2 232 +โ+โ xxxx
7. Multiply: 3
)32( โx
8. Divide: 3
356
2
41820
x
xxx โ+
9. Divide: 23
391343 234
โ
++โ+
x
xxxx
10. A projectile is fired from the top of an 80 ft building with an initial velocity of 64
feet per second. The height of the projectile, in feet, after t seconds is given by the
function 806416)( 2++โ= ttth graphed here.
a. Use the graph to determine how long it takes to
reach the maximum height.
b. How long will it take to hit the ground?
c. What is the height of the projectile after 4
seconds?
