Answer:
2
Step-by-step explanation:
Take the absolute value of the lowest y value.
So

Take the absolute value of highest y value.

Add those two together and divide by two.

So the amplitude is 2
Answer:
729
Step-by-step explanation:
Raise 27 to the power of 2.
729
Answer:
D) 28.762 cm
Step-by-step explanation:
The subtracton property of equality allows you to subtract the same amount from both sides of an equation without changing the truth of the equation.