No he isn't..
. 7×10=7
for each time it's multiplied by ten, the decimal point goes back one.
Answer:
y=(7)^x represents the exponential growth
3(4x+3) simplified as an expression is: 12x+9
If you know the whole price for 2.4 gallons, divide the whole price by 2.4 to get the cost for one, because when you multiply the cost for 1 by 2.4, you get the total.
7.56/2.4 = 3.15,
p= 3.15