She will earn $91.80. this is because 12 hours and 45 minutes is 12.75 hours and to find the total amount made we need to do 12.75× 7.20 which is 91.8
So but I don’t see the question
The number of charts that was coded per hour will be:
(number of charts)/(time taken)
number of charts=23 charts
time taken=7.5 hours
thus the rate will be:
23/7.5
=3.06666667
~3 charts per hour (to the nearest whole number)