Simplify the radical expression by factoring out the largest perfect nth power. Assume that all variables are positive.- 
A. xy
B. -3xy
C. 3xy
D. -3xy
Answer: B
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Write the following fraction as a terminating decimal or, if a repeating decimal, rounded to the thousandths place.
A. 0.46 B. 0.32 C. 0.2 D. 0.4
Simplify the exponential expression. Write the result using only positive exponents.
A. r6
B. 
C. 
D. r12
Solve the equation.
- 
= 0
A. 4 B. -3, 4 C. 8, 4 D. No solution
?Suppose a cable of a suspension bridge is suspended (in the shape of a parabola) between two towers that are 120 meters apart and 20 meters above the roadway as shown in the figure given below. The cable touches the roadway midway between the towers. Find the length of the parabolic supporting cable. Round your answer to two decimal places.
?
?
, 
?
A. ?48678.81 meters
B. ?49096.07 meters
C. ?49146.7 meters
D. ?47100.56 meters
E. ?47597.14 meters