Evaluate the integral.
A. 3
B. 3
C. 3(e?/4 - e-?/4 )
D. 0
Answer: D
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Determine whether the sequence is arithmetic.5.91, 7.84, 9.77, 11.70, . . .
A. Arithmetic B. Not arithmetic
Use a proportion to solve the problem.The 5th hole at the Riverwoods Golf Course is 375 yards long. How long would it be on a model with a scale of 2.5 inches to 75 yards?
A. 93.75 inches B. 12.5 inches C. 187.5 inches D. 6.25 inches
The current in an alternating circuit varies in intensity with time. If I represents the intensity of the current and t represents time, then the relationship between I and t is given by ? I = 20cos 160?t ? where I is measured in amperes and t is measured in seconds. Find the maximum value of I and the time it takes for I to go through one complete cycle. ?
A. The maximum value of I is 40 amperes; one complete cycle takes 
seconds.
B. The maximum value of I is 5 amperes; one complete cycle takes 
seconds.
C. The maximum value of I is 20 amperes; one complete cycle takes 
seconds.
D. The maximum value of I is 40 amperes; one complete cycle takes 
seconds.
E. The maximum value of I is 20 amperes; one complete cycle takes 
seconds.
For the given probability density function, over the stated interval, find the requested value.f(x) = 
? 
, over the interval [1.5,4.9]. Find E(x2).
A. 
B. 
C. 
D. 11.255