Find the quotient.-23 ÷ (-1)
A. 23
B. -23
C. - 
D. 
Answer: A
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Provide an appropriate response.Consider the quartic function f(x) = ax4 + bx3 + cx2 + dx + e, a ? 0. Must this function have at least one critical point? Give reasons for your answer. (Hint: Must 
for some x?) How many local extreme values can f have?
What will be an ideal response?
Solve the problem.A boat moves 6 kilometers upstream in the same amount of time it moves 20 kilometers downstream. If the rate of the current is 5 kilometers per hour, find the rate of the boat in still water.
A. 2
kilometers per hour
B. 5 kilometers per hour
C. 9
kilometers per hour
D. 8
kilometers per hour
Write the fraction in simplest form. Assume that all variable factors in the denominator are not equal to zero.
A. 
B. 
C. 
D. 
Solve the problem.From a boat on the lake, the angle of elevation to the top of a cliff is 32°55'. If the base of the cliff is 90 feet from the boat, how high is the cliff (to the nearest foot)?
A. 71 feet B. 68 feet C. 58 feet D. 61 feet