A taxi ca charges $0.80 for the first 1/5 of a mile and $0.10 for each additional 1/10 of a mile. What is the cost for a 3 mile trip?
1/5 is 0.2
After the first 0.2 mile, there is still 2.8 miles remaining
That's 28 * 1/10 of a mile
28 * $0.10 = $2.80
$0.80 + $2.80 = $3.60
Total cost for the trip is $3.60