Answer
Find out the what was the price of the stereo .
To prove
Let us assume that the price of the stereo be x .
As given
Consumer Math The sales tax in the town where Amanda lives is 7%.
7% is written in the decimal form

= 0.07
As given
Amanda paid $35 in sales tax on a new stereo .
Than the equation becomes
x × 0.07 = 35

solving the above
x = $ 500
Therefore the price of the stereo is $ 500 .
Hence proved
Answer:
The answer is B. 
Step-by-step explanation:
Because 
So the answer in this question is B.
Answer:
19.64
the permieter is 5 so 5/2=2.5 2.5x2.5=6.25 6.25x3.14=19.64