Solve the problem.After retirement, Kelly's company offers her two options for receiving her retirement pension. According the the first plan, she will receive monthly payments from a variable annuity that initially pays 
per month then decreases each month at a rate of 
per month per year. Optionally, she may choose a plan that pays her a fixed amount of 
per month for the rest of her life. The monthly payments for the two plans are illustrated in the graph
below. After how many years does the variable plan pay less per month than the fixed plan?
A. 9 years
B. 8 years
C. Up to 8 years
D. The variable plan always pays less.
Answer: B
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Find the volume of the indicated region.the region bounded by the coordinate planes, the parabolic cylinder 
, and the plane 
A. 500
B. 375
C. 
D. 
The monthly sales of Sunny Electronics' new stereo system is given by 
hundred units per month, x months after its introduction. The price Sunny charges is 
dollars per stereo system,
x months after its introduction. The revenue Sunny earns then must be 
. Find the rate of change of revenue 6 months after introduction. Round your answer to the nearest dollar.
?
A. $437,700 per month
B. $43,770 per month
C. $1,562,400 per month
D. -$391,800 per month
E. -$322,700 per month
What are the equations of the vertical and horizontal asymptotes of the graph of the given equation?y = 
A. Vertical: y = 0; horizontal: x = 1 B. Vertical: x = 0; horizontal: y = 1 C. Vertical: x = 0; horizontal: y = 0 D. Vertical: y = 0; horizontal: x = 0
Rationalize the denominator. Assume all variables have nonzero values.
A. 
B. 
C. 
D. 