Solve the problem.A manufacturer determines that the daily cost C, in dollars, to produce x units of a product is modeled by the function C(x) = 0.1x2 - 26x + 1590. How many units can the manufacturer produce each day in order to keep the daily cost below $390?
A. More than 60 but fewer than 200 units
B. More than 60 units
C. Fewer than 60 or more than 200 units
D. Fewer than 200 units
Answer: A
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Use this diagram of a regular pentagon to explain how to determine the formula for finding the vertex angle in a regular polygon.
Solve the problem.A steel can in the shape of a right circular cylinder must be designed to hold 550 cubic centimeters of juice (see figure). It can be shown that the total surface area of the can (including the ends) is given by S(r) = 2?r2 + 
, where r is the radius of the can in centimeters. Using the TABLE feature of a graphing utility, find the radius that minimizes the surface area (and thus the cost) of the can. Round to the nearest tenth of a centimeter. 
A. 0 cm B. 3.6 cm C. 4.4 cm D. 5.6 cm
?Use a table of integrals with forms involving 
to find the integral.
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A. ?
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Solve the equation.4s + 5 = 41
A. s = 17 B. s = 9 C. s = 4 D. s = 12 E. none of these