The cost C (in millions of dollars) of removing p% of the industrial and municipal pollutants discharged into a river is given by
?
.
?
Select the correct graph of the cost function.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: A
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Solve the equation.-4[5x - 7 - 7(x + 1)] = -5x + 1
A. 
B. 
C. 
D. 
Find the average value of 
over the given region.
z2 over the cube in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 
B. 
C. 
D. 
Use the integral test to determine whether the series converges.
A. diverges B. converges
Write a system of three inequalities that describe the constraints in the problem.Mrs. White wants to crochet beach hats and baby afghans for a church fund-raising bazaar. She needs 5 hours to make a hat and 2 hours to make an afghan and she has 31 hours available. She wants to make no more than 11 items and no more than 9 afghans. The bazaar will sell the hats for $11 each and the afghans for $5 each. Let x equal the number of hats made and y equal the number of afghans made.
A. 2x + 5y ? 31, x + y ? 11, y ? 9 B. 5x + 2y ? 31, x + y ? 11, y ? 9 C. 11y + 5x ? 31, x + y ? 11, y ? 9 D. 11x + 5y ? 31, x + y ? 11, y ? 9