Solve the problem.Ron finds 9 books at a bookstore that he would like to buy, but he can afford only 5 of them. In how many ways can he make his selection? How many ways can he make his selection if he decides that one of the books is a must?
A. 7560; 840
B. 15,120; 1680
C. 126; 70
D. 3024; 1680
Answer: C
Mathematics
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Solve the problem. Round your answer, if appropriate.A man 6 ft tall walks at a rate of 3 ft/sec away from a lamppost that is 23 ft high. At what rate is the length of his shadow changing when he is 70 ft away from the lamppost? (Do not round your answer)
A. 35 ft/sec
B. 
ft/sec
C. 
ft/sec
D. 
ft/sec
Mathematics
Graph the equation. Select integers for x, -3 ? x ? 3.y = 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.How many different ways can you make change for 75 cents using quarters, dimes, and nickels?
A. 18 ways B. 15 ways C. 16 ways D. 17 ways
Mathematics
Divide.
A. 2 R 4 B. 3 C. 4 D. 2 R 5
Mathematics