Solve the problem.A canoeist who took 6 hours to paddle 6 miles upstream was able to return to his starting spot in 45 minutes. What was the rate of the current?
A. 4.5 mph
B. 5 mph
C. 4 mph
D. 3.5 mph
Answer: D
Mathematics
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Determine the average rate of change for the function.f(x) = 4x + 2
A. 2 B. -2 C. -4 D. 4
Mathematics
Find the area of the sector formed by central angle ? = 2.8 in a circle of radius r = 5 inches. ?
A. 35.0 inches2 B. 35.4 inches2 C. 34.8 inches2 D. 34.7 inches2 E. 34.9 inches2
Mathematics
Perform the indicated operation.(2x2 - 6x - 6) + (-5x2 - 7x + 9)
A. 7x2 - 13x - 15 B. 7x2 - 13x + 15 C. 3x2 + 13x + 3 D. -3x2 - 13x + 3
Mathematics
Which of the following is (are) true of 
(I) (0, 0) is an inflection point(II) 
is an inflection point(III) (0, f(0)) is a relative minimum point(IV) f is increasing on (0, 2)
A. I, III, and IV B. I, II, and III C. I and II D. I, II, and IV E. all of these
Mathematics