A company makes cylindrical cans of radius r and height h at a cost of a cents per unit area for the top and bottom and b cents per unit area for the side. Express the cost of producing a can as a function of the two variables r, and h.Enter your answer in the form: 
Fill in the blank(s) with the appropriate word(s).
2?r(ar + bh)
Mathematics
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Solve the problem.The disk (x - 4)2 + y2 ? 1 is revolved about the y-axis to generate a torus. Find its volume. (Hint: 
= 
?, since it is the area of a semicircle of radius 1.)
A. 8?2 B. 2?2 C. 4?2 D. 4?
Mathematics
Solve the problem.For what values of m does the function y = aemx satisfy the equation y" - y' - 42y = 0?
A. m = 1, 42 B. m = -6, -7 C. m = -6, 7 D. m = 6, 7
Mathematics
Solve the equation by factoring.15x2 + 22x + 8 = 0
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Between x = 0 and x = 8, the largest value of the expression 
occurs where 
. Of the values of x that satisfy 
, which gives the maximum value of 
?
A. x = 7 B. x = 6 C. x = 2 D. x = 3
Mathematics