The graph of a polar equation is given. Select the polar equation for the graph.
A. r = 4 sin ?
B. r = 2 + cos ?
C. r = 2 + sin ?
D. r = 4 cos ?
Answer: B
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = (ln(cos t) + 3)i + 6j + (4 + t )k, -?/2 < t < ?/2
A. T = (sin t)i - (cos t)k; N = (cos t)i - (sin t)k; B. T = (-sin t)i + (cos t)k; N = (-cos t)i + (sin t)k C. T = (sin t)i + (cos t)k; N = (cos t)i - (sin t)k D. T = (-sin t)i + (cos t)k; N = (-cos t)i - (sin t)k
Solve the problem.A poker hand consists of 5 cards dealt from an ordinary deck of 52 playing cards. How many different hands are there consisting of four cards of one suit and one card of another suit?
A. 715 B. 111,540 C. 9295 D. 37,180
Classify the random variable as either discrete or continuous.The number of field goals kicked in a football game
A. Continuous B. Discrete
Evaluate the polynomial with the given replacement value.-7x2 + 10x + 8, x = 2
A. -4 B. 14 C. 0 D. -10