Perform the indicated operations. Leave the result in polar form.[2(cos 90° + j sin 90°)][5(cos 200° + j sin 200°)]
A. 10(cos 18,000° + j sin 18,000°)
B. 7(cos 290° + j sin 290°)
C. 7(cos 18,000° + j sin 18,000°)
D. 10(cos 290° + j sin 290°)
Answer: D
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The amount C, in pounds, of food consumed in a day by a sheep depends on the amount V, in pounds per acre, of vegetation present. The relationship is
.
A. Make a graph of C versus V. Include vegetation levels of up to 1000 pounds per acre.B. Does a change in vegetation make a greater difference in the amount a sheep will consume when there is little vegetation present or when there is a lot of vegetation present?C. What is the most a sheep will eat no matter how much vegetation is available?
What will be an ideal response?
Solve the problem.Find the volume of the solid generated by revolving the region enclosed by the ellipse 4x2 + 25y2 = 100 about the x-axis.
A. 4?2
B. 
C. 
D. 
Simplify. Assume variables represent nonnegative values.
A. 5
B. 25
C. 5
D. 8
Simplify the expression.(-y)7 ? (-y)8
A. (-y)15 B. (-y)56 C. (y)56 D. (y)15