
Amplitutde:

Normally for sinx amplitude is 2 (1 +1). In the case when it is half sine amplitude is halved, therefore 0.5 +0.5 = 1 Paramers alpha = 2x does not matter because it only stretches the graph horizontally.
The tree will keep growing each year 3 feet.
The measure of arc LMN = 2 mesure of angle LMN ==> 64°
Answer:
5.291 feet
Step-by-step explanation:
I used pythagorus thoery