Use the formula for the nth term to find r.a = -1215, r < 0, a5 = -15
A. -3
B. - 
C. 
D. - 
Answer: B
Mathematics
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Solve the problem.The intensity L(x) of light x ft beneath the surface of a lake satisfies the differential equation 
. At what depth, to the nearest foot, is the intensity one tenth the intensity at the surface?
A. 49 ft B. 22 ft C. 16 ft D. 33 ft
Mathematics
Estimate the answer by rounding as indicated.Estimate by rounding to the nearest hundred.
A. 3032 B. 3000 C. 2900 D. 3030
Mathematics
Find the zero of the linear function.f(x) = -x + 6
A. 0 B. 6 C. -12 D. -6
Mathematics
Define F: R × R ? R × R as follows: F(x, y) = (3y ? 1, 1 ? x) for all (x, y) in R × R.
Mathematics