Graph the step function.f(x) = 
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.If the price charged for a bolt is p cents, then x thousand bolts will be sold in a certain hardware store, where 
. How many bolts must be sold to maximize revenue?
A. 3456 thousand bolts B. 3456 bolts C. 1728 bolts D. 1728 thousand bolts
Find the mass of the wire that lies along the curve r and has density ?.C1: r(t) = (8 cos t)i + (8 sin t)j, 0 ? t ? 
;C2: r(t) = 8j + tk, 0 ? t ? 1; ? = 7t5
A. 
units
B. 
?5 units
C. 
?5 units
D. 
units
Find the slope of the line.2y = x + 13
A. 
B. -2
C. - 
D. 2
Solve the problem.The distance d in miles that can be seen on the surface of the ocean is given by 
where h is the height in feet above the surface. How high (to the nearest foot) would a platform have to be to see a distance of 17.5 miles?
A. 136 ft B. 117 ft C. 306 ft D. 459 ft