A force of 20 pounds stretches a spring 11 inches in an exercise machine. Find the work done in stretching the spring 3 feet from its natural position.
?
A. 
ft-lb
B. 
ft-lb
C. 
ft-lb
D. 
ft-lb
E. 
ft-lb
Answer: D
Mathematics
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Solve the problem.Let g(x) = x + 8. Find a function y = f(x) so that (f ? g)(x) = 2x + 16
A. f(x) = 2x B. f(x) = 2x + 8 C. f(x) = 2x - 8 D. f(x) = 2(x + 1)
Mathematics
Write the following as a rate in lowest terms.7 pounds for 21 people
A. 
B. 
C. 
D. 
Mathematics
A deck of cards contains 52 cards. These cards consist of four suits - hearts, spades, clubs, and diamonds. Each suit contains one of each of the following: 2, 3, 4, 5, 6, 7, 8, 9, 10, jack, queen, king, and ace. Assume that one card is selected at random from a well-shuffled deck of cards.Find the probability that the card is a diamond.
A. 
B. 
C. 
D. 
Mathematics
Find the missing length to the nearest tenth.
A. c = 8.5 m B. c = 3.3 m C. c = 36.5 m D. c = 73 m
Mathematics