Use a combination of rules for exponents to simplify. Write answers with only positive exponents. Assume that all variables represent nonzero real numbers.
-4
A. 
B. 
C. 
D. 
Answer: C
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Find an equation of variation in which the following are true.y varies jointly as x and w and inversely as z, and y = 
when x = 2, w = 2, and z = 28.
A. y = 
B. y = 
C. y = 28xwz
D. y = 
Solve the problem.A rotating beacon is located a distance d from a long wall. The distance d is given by 
, where t is the time measured in seconds since the beacon started rotating. Solve the equation for t.
A. t = 2? arctan 
B. t = 
tan 
C. t = 
arctan 
D. t = 2? tan 
Solve the problem.The string on a balloon is 37 millimeters long. What is this length measured in centimeters? Round to the nearest tenth, if necessary.
A. 370 cm B. 3.7 cm C. 0.4 cm D. 3700 cm
Name the property illustrated by the sentence.5(mn) = (5m)n
A. Multiplicative identity property B. Associative property of multiplication C. Multiplicative inverse property D. Commutative property of multiplication