Solve the problem.A deep-sea diver dives from the surface to 128 feet below the surface. She then dives down 12 more feet. Find the diver's depth.

A. 114 feet below the surface
B. 140 feet below the surface
C. 116 feet below the surface
D. 143 feet below the surface

Answer: B

Mathematics

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Match the surface show below to the graph of its level curves.

A.

B.

C.

D.

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Find (-18, 6) for f(x,y) = sin(3x + 9y).

Select the correct answer. a. 0 b. 9 c. -9 d. -3 e. 3

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Find anand a6 for the following arithmetic sequence.a16 = 83, a18 = 251

A. an = -1177 + 84(n - 1), a6 = -1681 B. an = -1177 + 84(n - 1), a6 = -673 C. an = -1177 + 84(n - 1), a6 = -757 D. an = -1177 - 84(n - 1), a6 = -6217

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Find the expected value for the random variable x having this probability function.

A. 6.6 B. 8 C. 6.8 D. 6

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Mathematics