Find the volume of the solid generated by revolving the region about the y-axis.The region enclosed by x = 2tan 
, x = 0, y = - 
A. 28? - 7?2
B. 28 - 7?
C. 7? + 7?2
D. 14? - 
?2
Answer: A
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Solve the problem.Which of the following vectors is orthogonal to 20i - 8j?
A. -10i - 25j B. 4i + 3j C. 15i - 6j D. 20i + 4j
Find the value of each square root by use of a calculator. Each number is approximate.
A. 0.0584 B. 0.0518 C. 0.0360 D. 0.05175
Write a linear inequality in two variables to represent the situation.A freight elevator has a limit of 5250 pounds. Suppose x crates of plastic parts, each crate weighing 900 pounds, and y crates of metal parts, each crate weighing 1050 pounds, are to be placed on the elevator. Write a linear inequality that describes the options for the number of crates of each type.
A. 900x + 1050y ? 5250 B. 900x + 5250y ? 1050 C. 900x + 1050y ? 5250 D. 1050x + 900y ? 5250
Solve the equation.
+ 
= 2
A. - 1, -4 B. 2, 4 C. - 1, 4 D. 1, -4