Simplify. Multiply and remove all perfect squares from inside the square roots.
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120x√(7x)

Step-by-step explanation:

Hi! :)

All we have to do here is some rounding, subtraction, and addition. First, round these numbers to the nearest whole number. 

$3.95=4

$5.99=6

$2.10=2

$1.05=1

Next, add all these together

4+6+2+1=13

Then subtract 13 from 15 and that should be approximately how much change she should get. 

15-13=2

Approx. change back: $2

Hope this helps!