Solve the problem. Round your answer, if appropriate.The radius of a right circular cylinder is increasing at the rate of 
, while the height is decreasing at the rate of 
. At what rate is the volume of the cylinder changing when the radius is 13 in. and the height is 8 in.?
A. -54 in.3/sec
B. 702? in.3/sec
C. 182 in.3/sec
D. 182? in.3/sec
Answer: B
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Rewrite the expression as the logarithm of a single quantity.
logax + 
loga y
A. loga (xy2/15)
B. loga (x2/3 + y1/5)
C. loga (x2/3 y1/5)
D. 
loga xy
Convert as indicated. If necessary, round to the nearest tenth of a degree.In a European cookbook, a recipe requires a mixture for candy to be heated to 
but the cook only has access to a Fahrenheit thermometer. Find the temperature in degrees Fahrenheit that should be used for making this candy.
A. 80°F B. 259.2°F C. 242.8°F D. 233.6°F
Simplify the expression by combining like terms.-9a + 2.1 + 2.5b + 4a - 8 - 7b + 5a
A. -5a + 9.5b - 5.9 B. -2.4b - 8 C. -10a - 4.5b - 5.9 D. -4.5b - 5.9
Find a simplified form of f(x). Assume that x can be any real number.f(x) = 
A. f(x) = (x + 1)
B. f(x) = ?2(x - 1)?
C. f(x) = ?x2 - 2x + 1?
D. f(x) = ?x - 1?