Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(x3y-1)7
A. x21y7
B. 
C. 
D. 
Answer: B
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Solve the problem.Tom and Larry are food inspectors at a cookie making company. Tom tests every 20th batch of dough for fat percentage. Larry tests every 28th batch of dough for carbohydrate percentage. If they both start working at the same time, which batch will be the first that they both test?
A. 35 B. 70 C. 140 D. 280
Solve the problem.Find the total area of the roof of the garage.
A. 182 ft2 B. 91 ft2 C. 273 ft2 D. 40 ft2
Perform the requested operation on the given function.f(x) = 
, g(x) = 
Find (fg)(x).
A. (
)(
)
B. (4x + 5)(25x - 4)
C. (5x - 2)(
)
D. (4x + 5)(5x - 2)
Solve the problem.Softee Blankets charges $6 for shipping orders of $20 or less, $10 for orders from $20.01 to $70, and $15 for orders over $70. One week shipping charges for 540 orders totaled $5320. There were 50 more orders for $20 or less shipped than there were orders for over $70. Find the number of orders shipped at each rate.
A. $20 or less: 250; $20.01 to $70: 170; over $70: 120 B. $20 or less: 170; $20.01 to $70: 250; over $70: 120 C. $20 or less: 290; $20.01 to $70: 130; over $70: 120 D. The numbers cannot be determined from the given information.