Simplify the expression. If any variables exist, assume that they are positive.3
- 2x
A. x
B. 2x
C. (3 - 2x)
D. Cannot be simplified
Answer: A
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Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.log x + log (x +1) = log 56
A. 
B. {8, -7}
C. {8}
D. {7}
Solve the problem.An arrow is shot straight up from level ground. The distance (in meters) of the arrow above the ground (the position function) is f(t) = 4 + 124t - 4.9t2 at any time t (in sec). Find f '(2) and the initial velocity of the arrow.
A. f '(2) = 104.4; initial velocity = 124 m/s B. f '(2) = -19.6; initial velocity = 124 m/s C. f '(2) = 104.4; initial velocity = 4 m/s D. f '(2) = 212.8; initial velocity = 124 m/s
Convert to an exponential equation.log5 
= -3
A. 5-3 = 
B. 51/125 = 3
C. 35 = 
D. 
3 = 5
Solve the problem.Emily can ride her bike 24 miles in 6 hours. How many miles can she ride in 2 hours?
A. 8 miles B. 2 mile(s) C. 4 miles D. 48 miles