Solve.An arch in the shape of the upper half of an ellipse is used to support a bridge spanning a creek 40 feet wide. The center of the arch is 10 feet above the center of the creek. What is the height of the arch at a distance 12 feet from the center of the creek?
A. 8 feet
B. 10 feet
C. 3 feet
D. 0.8 foot
Answer: A
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Find the average value of the function f over the given region.f(x, y) = 6x + 8y over the triangle with vertices 
, 
, and 
A. 
B. 8
C. 
D. 
Solve or simplify, whichever is appropriate.
- 1 + 
A. -4x - 6
B. 
C. {2}
D. 
Use the power rule for exponents to simplify the expression. Write the answer in exponential form.(104)-3
A. 1012
B. 
C. 
D. 107
A mail truck must deliver packages to 5 different homes (A, B, C, D, and E). 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 cheapest-link tour starting with vertex A is given by:
A. A, B, C, D, E, A. B. A, C, D, B, E, A. C. A, E, C, D, B, A. D. A, D, B, E, C, A. E. none of these