Question

The function f(t) = 7 cos(pi over 4t) + 12 represents the tide in Light Sea. It has a maximum of 19 feet when time (t) is 0 and a minimum of 5 feet. The sea repeats this cycle every 8 hours. After two hours, how high is the tide?

12 feet

16 feet

8.5 feet

16.5 feet

Answer 1

\[f(t)=7\cos(\pi/4 t+12)\]

Answer 2

The equation that you have written down seems incorrect. I think it should be \[f(t) = 7\cos (\pi/4 \times t) +12\]

Attached is the graph of the equation. The answer is 12 feet

Answer 3

Oops! Here's the graph.

Answer 4

thank you

Answer 5

Your welcome