Solve the problem.A stone is thrown into a pond. A circular ripple is spreading over the pond in such a way that the radius is increasing at the rate of 4.3 feet per second. Find a function, r(t), for the radius in terms of t. Find a function, A(r), for the area of the ripple in terms of r. 
A. (A ? r)(t) = 18.49?2t
B. (A ? r)(t) = 18.49?t2
C. (A ? r)(t) = 8.6?t2
D. (A ? r)(t) = 4.3?t2
Answer: B
Mathematics
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Solve the problem.On a math test, 5 of the 14 students are to get an A, 4 students a B, 3 students a C, and 2 students a D. How many different ways can the grades be assigned to the students?
A. 84,084 B. 1,681,680 C. 420,420 D. 2,522,520
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Evaluate the improper integral or state that it is divergent.
A. Divergent
B. 
C. 
D. 
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Provide an appropriate response.Sketch a graph of f(x) = |x + 7| - 4
What will be an ideal response?
Mathematics
Find the measures of angles 1, 2, and 3.
A. m?1 = 118°, m?2 = 28°, m?3 = 118° B. m?1 = 28°, m?2 = 118°, m?3 = 28° C. m?1 = 118°, m?2 = 62°, m?3 = 118° D. m?1 = 62°, m?2 = 118°, m?3 = 62°
Mathematics