Rationalize the denominator.
A. 
B. 
C. 
D. 
Answer: B
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Use a calculator to approximate the area of the surface generated when the given curve is revolved about the x-axis. Round to two decimal places when necessary.y = sinx on 
A. 3.94 B. 6.17 C. 16.19 D. 9.25
Find the area under the normal curve.Find the percent of the area under a normal curve between the mean and 2.41 deviations from the mean.
A. 49.18% B. 49.20% C. 99.20% D. 50.80%
Find the radian measure of a central angle of the circle of radius r that intercepts the arc of length s. Round your answer to three decimal places.r = 10.2 inches, s = 21 inches
A. 214.2 radians B. 6.468 radians C. 2.059 radians D. 0.486 radians
Find the indicated relative minimum or maximum.Maximum of f(x,y) = 4xy,subject to x + y = 8
A. f(4, 4) = 64 B. f(3, 5) = 64 C. f(0, 8) = 72 D. f(2, 6) = 72