). (a) how much does it cost to derive 100 miles if your cat gets 25 miles per gallon and the
asoline costs 2.50/gallon.
b). find a formula that gives the cost c as a function of m, g, and d. be sure to state the units of
each variable,
evetything

Well, for a)

the car does 25mpg, how about for 100 miles?
well, 100 is 4 * 25, so that means for 100 miles, the car will use up 4 gallons

now, each gallon is $2.5, so the total cost for that will be 4 * 2.5

for b)

m = miles
g = gallons
d = distance in miles