Find the length of the curve.The spiral r = e4?, 0 ? ? ? ?

A. (e^8? - 1)
B. (e^4? - 1)
C. e^8? -
D. (?² - 1)

Answer: B

Mathematics

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Find the limit.

A. 23
B.
C. 0
D. 9

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Mathematics

Evaluate the integral using the given substitution., u = cot 7?

A. - tan² 7? + C
B. - cot² 7? + C
C. cot² ? + C
D. csc³ 7? cot² 7? + C

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Mathematics

Answer the question about the given function.Given the function f(x) = x2 + 7x - 60, list the x-intercepts, if any, of the graph of f.

A. (12, 0), (5, 0) B. (-12, 0), (5, 0) C. (12, 0), (-5, 0) D. (-12, 0), (1, 0)

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Mathematics

Solve the problem using the quadratic formula.The formula d = is used to find the number of diagonals in certain polygons with n sides. If a polygon has 20 diagonals, how many sides does it have?

A. 11 sides B. 7 sides C. 9 sides D. 8 sides

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Mathematics