Solve.A cruise boat travels 72 miles downstream in 2 hours and returns to its starting point upstream in 12 hours. Find the speed of the stream.
A. 57 mph
B. 21 mph
C. 15 mph
D. 36 mph
Answer: C
Mathematics
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Factor using the formula for the sum or difference of two cubes.27x3 + 64
A. (3x + 4)(9x2 + 16) B. (3x + 4)(9x2 + 12x + 16) C. (3x - 4)(9x2 + 12x + 16) D. (3x + 4)(9x2 - 12x + 16)
Mathematics
If the following defines a one-to-one function, find its inverse. If not, write "Not one-to-one."f(x) = x3 - 10
A. f -1(x) = x + 10
B. f -1(x) = ±
C. Not one-to-one
D. f -1(x) = 
Mathematics
Complete the identity.
= ?
A. 
B. 
C. 
D. 
Mathematics
Use the figure to determine the derivative.The figure shows the graph of f(x) = 2 + 
along with its tangent line 
at the point (0, 2). What is f'(0)?
A. 1 B. 0 C. -1 D. 2
Mathematics