Simplify the expression. Write the result without using negative exponents. (Assume all variables represent nonzero real numbers.)
A. t2
B. t-8
C. 
D. 
Answer: D
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Approximate the circumference of the circle using 3.14 for ?.
A. 51.84 yd B. 50.24 yd C. 25.92 yd D. 25.12 yd
Simplify the expression.9m3 + 9m3
A. 19m3 B. 18m3 C. 18m6 D. 19m6
Use the accompanying graph of a particle moving on a coordinate line with velocity v = f(t) in ft/sec at time t seconds. The axes are marked off at one-unit intervals. Use these terms to describe the motion state: moving forward/backward, increasing/decreasing speed, and resting. Recall that speed = 
. 
Give the interval(s) when the speed of the particle is increasing.
A. (0, 2), (5, 6), and (11, 13) B. (0, 2), (5, 6), (11, 13), and (21, 23) C. (0, 2), (5, 6), and (21, 23) D. (0, 6), (11, 15), and (19, 23)
Simplify the expression.-4(4m - 3) - 2(2m - 3)
A. -20m - 18 B. -20m - 6 C. 6m + 18 D. -20m + 18