Solve the problem.When going more than 38 miles per hour, the gas mileage of a certain car fits the model 
where x is the speed of the car in miles per hour and y is the miles per gallon of gasoline. Based on this model, at what speed will the car average 15 miles per gallon? (Round to nearest whole number.)
A. 48 miles per hour
B. 73 miles per hour
C. 98 miles per hour
D. 149 miles per hour
Answer: B
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Write an equivalent double integral with the order of integration reversed.
A. 
B. 
C. 
D. 
A delivery truck must deliver furniture to 4 different locations (A, B, C, and D). The trip must start and end at A. The graph below shows the distances (in miles) between locations. We want to minimize the total distance traveled.
The nearest-neighbor tour starting with vertex A is given by:
A. A, B, D, C, A. B. A, C, B, D, A. C. A, D, B, C, A. D. A, D, C, B, A. E. none of these
Write a mathematical expression for the word phrase.Nine is greater than or equal to four
A. 9 ? 4 B. 9 = 4 C. 9 > 4 D. 9 ? 4
Find the intervals on which the function is continuous.y = 
A. discontinuous only when x = -2 or x = 3 B. discontinuous only when x = -3 or x = 2 C. discontinuous only when x = 2 or x = 3 D. discontinuous only when x = 2