Let P = 
, X = 
, and T = 
, where all the elements are real numbers. Use these matrices to determine whether the statement is true or false for 2 × 2 matrices.(PX)T = P(XT)
A. True
B. False
Answer: A
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Find the volume.Find the volume of the solid generated by revolving the area under y = 6e-x in the first quadrant about the y-axis.
A. 1 B. 12? C. 6? D. 24?
Represent the sets on a number line.{x|2 ? x < 6}
A. 
B. 
C. 
D. 
Solve the problem.Suppose that a household appliance draws a current represented by the relation src="https://sciemce.com/media/4/ppg__rrrr0629191332__f1q189g5.jpg" alt="" style="vertical-align: -4.0px;" /> where a, k, and d are constants.
where t is time measured in seconds. The power consumed by the appliance is 
where R is a constant. Take R to be 12 and graph the power in 
by 
and use an identity to write the expression for the power in the form
A. P = 150 cos(240?t) + 150
[0, 0.04, 0.01] by [-200, 2000, 200]
B. P = 300 cos(240?t) + 300
[0, 0.04, 0.01] by [-200, 2000, 200]
C. P = 150 cos(120?t) + 150
[0, 0.04, 0.01] by [-200, 2000, 200]
D. P = -150 cos(240?t) + 150
[0, 0.04, 0.01] by [-200, 2000, 200]
Find the midrange for the group of data items.96, 96, 93, 47, 75, 96
A. 85.5 B. 71.5 C. 94.5 D. 70