Answer: $13
Step-by-step explanation:
Given: The cost of two rolls of paper towel = $1
The cost of a box of diapers = $3
Then, the cost of two boxes of diapers =[tex]2\times3=\$6[/tex]
Now, the total cost of two rolls of paper towel and 2 boxes of diapers is given by :-
[tex]\$1+\$6=\$7[/tex]
The amount will get as change from a 20 dollar bill=[tex]\$20-\$7=\$13[/tex]
Hence, the she will get $13 as change from a 20 dollar bill.