Solve the application by setting up a proportion. Write a sentence answering the question.An outlet store had monthly sales of $113,000 and spent 20% of it on freight costs. How much was spent on freight costs?
A. $56,500 was spent on freight costs.
B. $565,000 was spent on freight costs.
C. $22,600 was spent on freight costs.
D. $226,000 was spent on freight costs.
Answer: C
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Solve the problem.The lifespan for a pair of walking shoes is normally distributed with a mean of 
steps and standard deviation of 
steps. If a manufacture produces 6000 pairs of these shoes, how many can be expected to last for at least 756,000 steps?
A. ? 1313 pairs B. ? 1271 pairs C. ? 1205 pairs D. ? 1391 pairs
Compare the right-hand and left-hand derivatives to determine whether or not the function is differentiable at the point whose coordinates are given.
y = 
y = -1
A. Since limx?-1+ f '(x) = 0 while limx?-1- f '(x) = 1, f(x) is not differentiable at 
B. Since limx?-1+ f '(x) = 0 while limx?-1- f '(x) = -1, f(x) is not differentiable at 
C. Since limx?-1+ f '(x) = -1 while limx?-1- f '(x) = 0, f(x) is not differentiable at 
D. Since limx?-1+ f '(x) = 0 while limx?-1- f '(x) = 0, f(x) is differentiable at 
Choose the most reasonable unit of measure.Area of a town: 19 
(in.2, ft2, yd2, mi2)
A. yd2 B. ft2 C. mi2 D. in.2
Solve the equation using the square root property.x2 - 49 = 0
A. {-7} B. {7} C. {7, -7} D. {49}