Identify the type of surface represented by the given equation. +  = 2

A. Paraboloid
B. Ellipsoid
C. Parabolic cylinder
D. Elliptical cylinder


Answer: D

Mathematics

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Solve the problem.Given the velocity and initial position of a body moving along a coordinate line at time t, find the body's position at time t.v = -14t + 8, s(0) = 11

A. s = - 7t2 + 8t + 11 B. s = 7t2 + 8t - 11 C. s = - 7t2 + 8t - 11 D. s = -14t2 + 8t + 11

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Solve.One-eighth of the parts tooled by a machine are rejects. How many parts must be tooled to ensure 7175 acceptable ones?

A. 8400 B. 7800 C. 7500 D. 8200

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Solve the problem.The sound produced by touching each button on a touch-tone phone is described by y = sin 2?lt + sin 2?htwhere l and h are the low and high frequencies (cycles per second) in the figure shown.Describe the sound emitted by touching the 0 key as a product of sines and cosines.

A. y = 2 sin(536?t) cos(2418?t) B. y = 2 sin(395?t) cos(2277?t) C. y = 2 sin(2418?t) cos(536?t) D. y = 2 sin(2277?t) cos(395?t)

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Solve the problem.Two recording devices are set 2600 feet apart, with the device at point A to the west of the device at point B. At a point on a line between the devices, 200 feet from point B, a small amount of explosive is detonated. The recording devices record the time the sound reaches each one. How far directly north of site B should a second explosion be done so that the measured time difference recorded by the devices is the same as that for the first detonation?

A. 1072.57 feet B. 1284.52 feet C. 4449.72 feet D. 436.36 feet

Mathematics