Evaluate the integral.
A. 
cos (9x - 10) + C
B. -cos (9x - 10) + C
C. - 
cos (9x - 10) + C
D. 9 cos (9x - 10) + C
Answer: C
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Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
A. 10.02 B. 9.98 C. 10.98 D. 9.02
Find the mode.93, 25, 93, 13, 25, 29, 56, 93
A. 25 B. 93 C. 42.5 D. 53.4
The following graph shows the monthly sales for Big "D" Sales during 2000 and 2001. Use the graph to solve the problem.
What was the total increase in sales from 2000 to 2001?
A. $12,000 B. $182,000 C. $22,000 D. $1,342,000
Solve the problem.The formula v = (2.5r)1/2 can be used to estimate the maximum safe velocity v, in miles per hour, at which a car can travel along a curved road with a radius of curvature r, in feet. To the nearest whole number, find the radius of curvature if the maximum safe velocity is 15.
A. 90 ft. B. 563 ft. C. 225 ft. D. 36 ft.