Give the amplitude or period as requested.Period of y = -5 cos x
A. ?
B. 
C. 5
D. 2?
Answer: D
Mathematics
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Solve the problem.A circular pond is being installed in the corner of a yard, as shown. The installer needs to know the value of x in feet. Find x to the nearest tenth of a foot. 
?a = 47 ft
A. 55.1 ft B. 55.3 ft C. 54.7 ft D. 54.4 ft
Mathematics
Find any intercepts. Then graph the linear equation.-x + 4y = 16
A. (-16, 0); (0, -4)
B. (-4, 0); (0, 4)
C. (-16, 0); (0, 4)
D. (-16, 0); (0, 16)
Mathematics
Solve the problem. Round dollars to the nearest cent and rates to the nearest tenth of a percent.The cost of an item is $76. For a special year-end sale the price is marked down 20%. Find the selling price of the item.
A. $15.20 B. $60.80 C. $91.20 D. $63.33
Mathematics
Evaluate the sum. Round to two decimal places, if necessary. 
A. 0.26 B. 62 C. 0.62 D. -0.82
Mathematics