Answer:
$280
Step-by-step explanation:
Sell 24 pieces in 3 hours, so 8 pieces in 1 hour
in 7 hours 8*7 = 56 pieces, each for $5
56 piece cost 5^56 = $280
y= 1/2x+2
y int is 2
x int is -2
plug in 0 for y int
set the equation equal to 0 for x int