First we want to find how much it costs for 1 stamp, so we do 8.28 divided by 18, which equals 0.46. Then, we multiply 0.46 and 12, which is 5.52. Therefore, it would cost $5.52 to buy 12 stamps.
Answer:
f(x)=100-5h
Step-by-step explanation:
Let's say that the variable h is the number of hours.
f(x)=100-5h
f(x)=100 percent minus 5 percent per hour.