Find the indicated intersection or union.{q, s, u, v, w, x, y, z} ? {q, s, y, z}
A. {q, s, u, v, w, y}
B. {q, s, y, z}
C. {v, x}
D. {s, u, v, w, x, z}
Answer: B
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Find the unit tangent vector of the given curve.r(t) = (7 sin3 7t)i + (7 cos3 7t)j
A. T = (7 sin 7t)i - (7 cos 7t)j B. T = (sin 7t)i - (cos 7t)j C. T = (147 sin 7t)i -(147 cos 7t)j D. T = (7 cos 7t)i - (7 sin 7t)j
Determine which numbers in the set are solutions to the equation.7n + n = 64; {8, 9, 512}
A. 512 B. 9 C. 8 and 9 D. 8
Solve by the method specified.Addition method8x + 5y = -704x - 3y = -2
A. (-5, -5) B. (-6, -6) C. (-6, -5) D. (-5, -6)
Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20 B. 100 C. 10 D. 500