Solve the problem.Write the percent as a decimal: 80%
A. 0.8
B. 0.69
C. 8
D. 0.08
Answer: A
Mathematics
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Solve.On a construction site, a winch is used to wind cable onto the drum of the winch. For the first layer of cable, the line pull P of the winch is related to the diameter D of the drum by the formula P = 
where k is a constant. If P = 4800 lb and D = 6 in., find the value of the constant k in foot-pounds. (Hint: Convert D to feet first.)
A. 800 ft lb B. 2400 ft lb C. 28,800 ft lb D. 9600 ft lb
Mathematics
Find the exact value of y, or state that y is undefined.y = cos-1 (-4)
A. ? B. undefined C. 0 D. -4
Mathematics
Simplify the expression using the order of operations.(2 + 9) ? 7 + [16 ÷ (4 ÷ 4)]
A. 66 B. 81 C. 78 D. 93
Mathematics
Add or subtract as indicated. Write the answer in simplest form.- 
+ 
+ 
A. 
B. - 
C. - 
D. 
Mathematics