Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(5 - 7)2

A. 76 - 70
B. 174 + 70
C. 118 - 70
D. 174 - 70


Answer: D

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

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Solve the problem.Ignoring friction, the time , t (in seconds), required for a block to slide down an inclined plane is given by the formula  where b is the length of the base in feet and  per second is the acceleration of gravity. How long does it take a block to slide down an inclined plane with a base of 12 feet at an angle of  Round your answer to three decimal places.

A. 0.361 sec B. 0.885 sec C. 7.104 sec D. 1.252 sec

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Add the polynomials.(2a2 - 3a + 6) + (5a - 2)

A. 2a2 + 8a - 4 B. 4a2 + 4 C. 2a2 + 4a + 8 D. 2a2 + 2a + 4

Mathematics

Find the first six terms of the sequence.a1 = 1, an = 2an-1

A. 1, 3, 6, 9, 12, 15 B. 1, 2, 4, 8, 16, 32 C. 0, 3, 3, 6, 9, 12 D. 2, 4, 8, 16, 32, 64

Mathematics