Evaluate the integral by making the given substitution.
?cos2xdx, u = 2x
Mathematics
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Simplify the expression.e-3 ln x
A. -x3
B. 
C. - 
D. -3x
Mathematics
Evaluate the expression according to the order of operations.8 ? 8 + 12 ÷ [8 - (3 + 2)]
A. 67 B. 70 C. 69 D. 68
Mathematics
Estimate the answer by rounding as indicated.Estimate by rounding to the leftmost digit.31,698 ÷ 484
A. 600 B. 50 C. 60 D. 500
Mathematics
If the sequence is geometric, find the common ratio. If the sequence is not geometric, say so.4, 12, 36, 108, 324
A. 12 B. 1/3 C. 3 D. Not geometric
Mathematics