Solve.Last year, Karl's average electricity bill was $123.49. Last month, his electricity bill was $163.19. How much above last year's average was last month's bill?
A. $40.70
B. $39.70
C. $39.80
D. $29.70
Answer: B
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Use I = Prt for simple interest to find the indicated quantity.P = $3000; t = 90 days; I = $105. Find r. (Use 360 days in a year.)
A. 3.5% B. 14.0% C. 9.7% D. 14.2%
Solve and graph the inequality and graph the solution.7a - 8 > 6a - 7
A. (1, ?)
B. (-15, ?)
C. (-?, -15)
D. (-?, 1)
Perform the requested composition or operation.Find (f - g)(3) when f(x) = 2x2 + 4 and g(x) = x - 1.
A. 18 B. -25 C. 26 D. 20
Solve the problem.The design of an electric power generating station depends on both the peak and the average power that it must produce. If a community uses 168 + 72t - 3t2 megawatts at time t (in hours) during the period t = 0 to t = 24, find the average level of power consumption for that day.
A. 24,768 MW B. 456 MW C. 1032 MW D. 10,944 MW