Answer:
$157.5
Step-by-step explanation:
We are told that Rob babysits the kids next door everyday after school for 1.5 hours. He earns $3.50 an hour.
First of all we will find the amount that Rob earns for each day of babysitting by multiplying 1.5 by 3.50.

Let us find number of days Rob will babysit in 6 weeks by multiplying 6 by 5 as school will be in session 5 days a week the whole time.
Now let us find amount of money that Rob will get for babysitting for 30 days by multiplying 30 by 5.25.


Therefore, Rob will earn an amount of $157.5 for 6 weeks of babysitting.