Without graphing the function, determine its amplitude or period as requested.y = -2 cos xFind the period.
A. ?
B. 2?
C. 2
D. 
Answer: B
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Solve.Tim needs to apply 3
gallons of herbicide per acre of soybeans. How many gallons of herbicide are needed for 212 acres?
A. 162 gallons
B. 56
gallons
C. 159
gallons
D. 795 gallons
Convert the units using two or three unit fractions.5 wk = 
min
A. 50,400 B. 36,000 C. 10,080 D. 25,200
Solve the inequality graphically, numerically, or symbolically, and express the solution in interval notation. Where appropriate, round to the nearest tenth.8?x + 4? ? 8
A. 
? 
B. 
? 
C. 
? 
D. 
Solve the problem.A surveyor is measuring the distance across a small lake. He has set up his transit on one side of the lake 90 feet from a piling that is directly across from a pier on the other side of the lake. From his transit, the angle between the piling and the pier is 55°. What is the distance between the piling and the pier to the nearest foot?
A. 74 ft B. 129 ft C. 63 ft D. 52 ft