Answer:
Amplitude = 4
Step-by-step explanation:
The general form of a sine curve would be 
where A is the <u>"amplitude"</u>, or the "tallness" or "shortness" of the graph.
Technically, amplitude is the absolute value of the number that is multiplied in front of "Sin". So the amplitude is 4.
<u>Note:</u> The negative sign in front of 4 plays the role of "flipping" the curve upside down.
Angle CBA is the right name because it's in between C and A
t must equal √2h/g but I don't see that in the choices above
Given a temperature C in celsius, you can convert it to Fahrenheit by using the formula
In your case C=39, so you have
