Answer:
3.5 hours
Step-by-step explanation:

Hope this helps!
Answer:
The answer is 7
Step-by-step explanation:
the answer is A (need more characters to add this so here)
Answer: The amplitude is 4.
Step-by-step explanation:
Given the form of the sine function:

Where
is the amplitude,
is the period and "k" is the vertical shift of the wave.
You know that, in the sine function given (
), you can identify the amplitude and the period. These are:


Therefore, the amplitude of
is:
