Solve. Remember to insert units when writing your answer.A nature path in a state park is 9 mi 680 yd long. If a hiker hikes this path 3 times in a year, what is the total distance that he has hiked on this path?
A. 29 mi 281 yd
B. 27 mi 680 yd
C. 28 mi 280 yd
D. 29 mi 280 yd
Answer: C
Mathematics
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Give an appropriate answer.Find all points (x, y) at which the tangent plane to the graph 
is horizontal.
A. (0, 1) B. (x, 1) C. (x, 1), (x, -1) D. (0, 1), (0, -1)
Mathematics
Find the area of the shaded region.
A. 
B. 
C. 
D. 32
Mathematics
Suppose that y is directly proportional to x. Use the given information to find the constant of proportionality k. Then use y = kx to find y for the given value of x.y = 7.5 when x = 15;
Find y given x = 6.
A. k = 0.5; y = 3
B. k = 112.5; y = 
C. k = 1.5; y = 2.4
D. k = 0.5; y = 2.4
Mathematics
Find the unknown length in the right triangle. If necessary, approximate the length to the nearest thousandth.
A. 6.325 ft B. 40 ft C. 10 ft D. 20 ft
Mathematics