Answer:
$8.50
Step-by-step explanation:
12=s+3.50
-3.50 -3.50
8.50=s
A = 6.3033315211545 in2 or 6.3
43/6=z
10
2n-6
n=8
2(8)-6
16-6
.125 for 1 button
6 dollars for 48 buttons