Solve the problem.A satellite dish is shaped like a parabola. The signals that are received by the dish strike the surface of the dish and are reflected to a single point, where the receiver of the dish is located. If the dish is 14 feet across at its opening and 6.1 feet deep at its center, at what position should the receiver be placed?
A. 2 feet from the base along the axis of symmetry
B. 12.3 feet from the base along the axis of symmetry
C. 0.1 feet from the base along the axis of symmetry
D. 24.5 feet from the base along the axis of symmetry
Answer: A
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Solve the problem.Consider a retirement savings account where the monthly contribution is $175 for the first 20 years, is increased to $225 for the next 5 years, and then is increased once again to $375 for the last 15 years. The APR is always 4.8% compounded monthly. What is the value of the account at the end of 40 years? Round your answer to the nearest cent.
A. $310,143.23 B. $314,907.23 C. $313,040.67 D. $312,009.78 E. $315,938.12
Graph the ellipse and locate the foci.
+ 
= 1
A. foci at (4, 0) and (-4, 0)
B. foci at (5, 0) and (-5, 0)
C. foci at (0, 
) and (0, -
)
D. foci at (
, 0) and (-
, 0)
Find the second-order partial derivatives of the function.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Determine between which two consecutive whole numbers each square root lies.
A. 8 and 9 B. 9 and 10 C. 7 and 8 D. 10 and 11