00:01
Okay, so part a for this problem just wants us to calculate how much, what's the cost of gasoline per mile? so we need a gasoline per mile, cost per mile.
00:24
Okay, we already know that this car gets 22 miles per gallon and that the cost per gallon is $4.
00:44
So $4 per gallon.
00:51
So the best way to get this into cost per mile is to a divide so that our gallons cancel out.
01:06
So we're going to do four divide about 22.
01:13
So if we do $4 per gallon times the reciprocal of our miles per gallon.
01:23
So we have 122 gallons per mile.
01:34
Is going to equal 2 over 11 cost per mile.
01:49
So maybe $2 per 11 miles or just 2 over 11 and write that as a decimal.
01:55
So we could just write that as a decimal.
01:57
I prefer to keep it as a fraction for now.
02:00
Just looking ahead to the rest of the problem.
02:02
But it's just going to come out to be around 0 .18 cents per mile.
02:14
Okay, so part b says, as soon the total cost is the price of the car and the cost of gasoline...