Solve the problem.The force required to compress a spring varies directly as the change in the length of the spring. If a force of 18 pounds is required to compress a certain spring 4 inches, how much force is required to compress the spring 7 inches?
A. 21 pounds
B. 10.3 pounds
C. 35 pounds
D. 31.5 pounds
Answer: D
Mathematics
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For the given expression y', find y'' and sketch the general shape of the graph of y = f(x). y' = x-2/3(x - 4)
A. 
B. 
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D. 
Mathematics
Simplify. Write final answer in radical form when necessary.
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A. 
B. 
C. 
D. 
Mathematics
Solve.The weight W of an object on the Moon varies directly as the weight E on earth. A person who weighs 195 lb on earth weighs 39 lb on the Moon. How much would a 132-lb person weigh on the Moon?
A. 660 lb B. 366 lb C. 26.4 lb D. 0.2 lb
Mathematics
Provide an appropriate response.Write the largest five-digit number possible using the digits 5, 2, and 7. Use each digit at least once.
A. 77,572 B. 77,752 C. 77,725 D. 75,772
Mathematics