Solve the problem. Round your answer, if appropriate.A man 6 ft tall walks at a rate of 6 ft/sec away from a lamppost that is 24 ft high. At what rate is the length of his shadow changing when he is 75 ft away from the lamppost? (Do not round your answer)
A. 
ft/sec
B. 75 ft/sec
C. 
ft/sec
D. 2 ft/sec
Answer: D
Mathematics
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How many ways are there to arrange 12 students into groups of 3? ?
A. 1,320 B. 12(11) C. ?220 D. 110 E. ?12!(3!)
Mathematics
Solve the problem.Water is falling on a surface, wetting a circular area that is expanding at a rate of 
How fast is the radius of the wetted area expanding when the radius is 
(Round your answer to four decimal places.)
A. 91.4552 mm/s B. 0.0687 mm/s C. 0.0109 mm/s D. 0.0219 mm/s
Mathematics
Simplify.2 ? 6 + 4(9 - 4) + 5
A. 105 B. 49 C. 52 D. 37
Mathematics
Graph the function by starting with the graph of the basic function and then using the techniques of shifting, compressing, stretching, and/or reflecting.f(x) = (x + 4)2 
A. 
B. 
C. 
D. 
Mathematics