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 6 in. and the height is 13 in.?
A. -102 in.3/sec
B. 612? in.3/sec
C. 144 in.3/sec
D. 144? in.3/sec
Answer: B
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Solve the problem.How many different sequences of 4 digits are possible if the first digit must be 3, 4, or 5 and if the sequence may not end in 000? Repetition of digits is allowed.
A. 2,997 B. 2,000 C. 1,512 D. 2,999
Multiply the complex numbers and simplify powers of i.(3 + 4i)2
A. 25 + 24i B. 9 + 16i C. 9 - 16i D. -7 + 24i
Find the sample standard deviation of the data set.
Use the following information to answer question, 24 students in an engineering class were asked to record the number of hours spent in a lab during a week. The results are listed below. 3, 10, 21, 14, 8, 5, 1, 4, 13, 7, 9, 6, 11, 10, 6, 7, 12, 16, 1 , 7, 14, 1, 11, 8
Simplify the algebraic expression.6.7m + 19.1m
A. 51.6m B. 25.8m2 C. 25.8m D. 127.97m