Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are positive.(9x1/5 ? y1/5)2
A. 81x2/5y2/5
B. 81x1/25y1/25
C. 81x2y2
D. 81x1/10y1/10
Answer: A
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Solve the problem. Assume that simple interest is being calculated in each case. Round the answer to the nearest cent unless otherwise indicated.Robert Hall opened a computer service company. To pay for startup costs, Robert Hall borrowed 
from a bank at 5% for 1 year. Find the interest.
A. $3350.00 B. $335.00 C. $4020.00 D. $70,350.00
Solve the problem.A cross-country skier reaches the 10-km mark of a race 40 min after reaching the 
mark. Find the speed (average rate of change) of the skier.
A. 7 km/hr
B. 
km/hr
C. 
km/hr
D. 15 km/hr
Expand, where i2 = -1.
4
A. -1 B. 1 C. 1 - i D. 1 + i
Find the average rate of change of the function as x changes from a to b.f(x) = -x3; a = -1, b = 5
A. 21 B. -29 C. -21 D. 31