Solve Applied Problems Involving Parabolas
-A Reflecting Telescope Has a Parabolic

Multiple Choice

Solve Applied Problems Involving Parabolas
-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) $\frac { 507 } { 512 } \mathrm { in }$ .
B) $\frac { 1521 } { 128 } \mathrm { in }$ .
C) $\frac { 169 } { 2048 }$ in.
D) $\frac { 256 } { 39 } \mathrm { in }$ .