Remove parentheses and simplify.-9(7r + 4) + 6(4r + 5)
A. -39r + 4
B. -39r - 6
C. -2r - 5
D. -99r
Answer: B
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Suppose u and v are differentiable functions of x. Use the given values of the functions and their derivatives to find the value of the indicated derivative.u(1) = 3, u '(1) = -5, v(1) = 6, v '(1) = -4.
(uv) at x = 1
A. -42 B. 18 C. -39 D. 42
Evaluate the improper integral.
A. 288(1 - ln 2) B. 48(1 - ln 2) C. 96(1 - ln 2) D. 576(1 - ln 2)
Solve.A boat moves 5 kilometers upstream in the same amount of time it moves 19 kilometers downstream. If the rate of the current is 8 kilometers per hour, find the rate of the boat in still water.
A. 13
kilometers per hour
B. 8 kilometers per hour
C. 6
kilometers per hour
D. 2
kilometers per hour
Find the domain and the range for the function.
A. D: (-?, 4) ? (4, ?), R: (-?, 8) ? (8, ?) B. D: (-?, -4) ? (-4, ?), R: (-?, -8) ? (-8, ?) C. D: (-?, ?), R: (-?, ?) D. D: (-?, 8) ? (8, ?), R: (-?, 4) ? (4, ?)