Solve the problem.A reflecting telescope has a parabolic mirror for which the distance from the vertex to the focus is 32 feet. If the distance across the top of the mirror is 78 inches, how deep is the mirror in the center?
A. 
in.
B. 
in.
C. 
in.
D. 
in.
Answer: D
You might also like to view...
Solve.Using the chessboard parable, find the total number of grains when all squares up to and including 18 are filled.
A. 262,143 grains B. 34 grains C. 131,072 grains D. 65,536 grains
Solve the equation using the square root property.2(x + 9)2 + 11 = 67
A. {-9 + 2
i, -9 - 2
i}
B. {9 + 2
i, 9 - 2
i}
C. {-9 + 2
, -9 - 2
}
D. {9 + 2
, 9 - 2
}
Use the compound interest formula to compute the future value of the investment. Round to the nearest cent.$18,000 at 3% compounded semiannually for 10 years
A. $24,243.39 B. $23,400.00 C. $24,190.49 D. $20,889.73
Solve the problem.The northern third of Indiana is a rectangle measuring 96 miles by 132 miles. Thus, let 
Assuming that the total annual snowfall (in inches), S(x,y), at 
is given by the function S(x,y) = 60e-0.001(2x + y) with (x,y) ? D, find the average snowfall on D.
A. 51.78 inches B. 52.44 inches C. 52.06 inches D. 51.14 inches