My niece earns six dollars and 50 cent for every hour that she babysits. on monday she babysits for 1.9 hours. on tuesday she baby 6 3/4 hours. on wednesday she babysits for 9.2 hours how much money does my niece earn in all

First u find out how much the niece is earning in a minute by 6.50÷60 minutes = 0.10 cents. this means that the niece makes 0.10cents in a minute
For Monday,she babysits for 1.9 hour(change it to minutes by multiplying with 60) 1.9×60=114 minutes. then u multiply 0.10 with the number of minutes obtained(114), 0.10×114=11.4.which means she earns 11 dollars and 4cents on mondays.
For Tuesday: she babysits for 6 3/4 hours(change it to minutes by multiplying with 60) 6×3/4×60
=4.5×60
=270minutes
then, 0.10×270= 27 dollars ,which means on tuesday she earns 27dollars.
For Wednesday,she babysits for 9.2hours(change it to minutes by multiplying by 60), 9.2×60= 552 minutes
then multiply the minutes obtained by 0.10,
0.10×552=55.2
which means on Wednesdays she earns 55 dollars and 2 cents