Solve the Problem $6 \mathrm { ft }$ From a Wall $b$

Solve the problem.
-A rotating beacon is located $6 \mathrm { ft }$ from a wall. If the distance from the beacon to the point on the wall where the $b$ is aimed is given by
$$a = 6 | \sec 2 \pi t | \text {, }$$
where $t$ is in seconds, find a when $t = 0.28$ seconds. Round your answer to the nearest hundredth.

A) $20.72 \mathrm { ft }$
B) $- 32.02 \mathrm { ft }$
C) $32.02 \mathrm { ft }$
D) $9.41 \mathrm { ft }$

Correct Answer:

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