The first several terms of a sequence are given. Find the indicated partial sum.81, -243, 729, -2187, . . . ; S4
A. 4941
B. - 1134
C. -2187
D. - 1620
Answer: D
Mathematics
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Solve the problem.The numbers below represent the amount of precipitation, in inches, on January 1st in eleven different U.S. cities. Find the mean precipitation. Round your answer to the nearest ten-thousandth of an inch.
A. 0.1248 in. B. 0.1040 in. C. 0.1135 in. D. 0.108 in.
Mathematics
Find the indicated term by use of the following information. The r + 1 term of the expansion of (a + b)n is given by 
an - r brThe term involving y11 in (x + y)15
A. 1365x4y11 B. 455x4y11 C. 5460x4y11 D. 4x4y11
Mathematics
Find the whole.16 lawyers is 2% of what number of lawyers?
A. 800 B. 32 C. 8000 D. 80
Mathematics
Find the perimeter of the polygon.
A. 81 cm B. 43 cm C. 44 cm D. 35 cm
Mathematics