Determine whether the expression is a monomial. If it is a monomial, state the coefficient and degree.-4x3y6

A. not a monomial
B. monomial; coefficient -4; degree 6
C. monomial; coefficient -4; degree 3
D. monomial; coefficient -4; degree 9

Answer: D

Mathematics

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Find an explicit formula for an.0, 2, 2, 2, 0, 2, 2, 2, . . .

A. an = 1 + (-1)(n(n - 1))/2 B. an = 1 + (-1)(n(n + 1))/2 C. an = 1 + (-1)((n+1)(n+2))/2 D. an = 1 + (-1)(n(n + 1)(n + 2))/6

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Find the extreme values of the function subject to the given constraint.

A. Maximum: none; minimum: 2 at
B. Maximum: none; minimum:  at
C. Maximum: none; minimum:  at
D. Maximum: none; minimum:  at

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Evaluate the integral by making a substitution (possibly trigonometric) and then applying a reduction formula.

A. [csc(e^t - 2) cot(e^t - 2) + ln] + C
B. [csc(e^t - 2) cot(e^t - 2) - ln] + C
C. - [csc(e^t - 2) cot(e^t - 2) + ln] + C
D. - [csc(e^t - 2) cot(e^t - 2) - ln] + C

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Find the unknown length in the space figure.Find the distance d. Give an exact answer.

A. 28
B. 20
C. 4
D. 2

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Mathematics