Jim rented a truck for one day. There was a base fee of $18.95, and there was an additional charge of 80 cents for each mile driven. Jim had to pay $230.15 when he returned the truck. For how many miles did he drive the truck?

Let's start by subtracting the base fee from the total amount paid to get the amount paid for miles driven:

$230.15 - $18.95 = $211.20

Now we can divide this amount by the cost per mile to find the number of miles Jim drove:

$211.20 รท $0.80/mile = 264 miles

Therefore, Jim drove the truck for 264 miles.