Answer:
2.) 
3.)
4.)
5.)
Step-by-step explanation:
(surface area of a rectangular prism)
3.) 
4.) 
5.) 
The top one on the left is equivalent to the second one down on the right; the second one down on the left is equivalent to the bottom one on the right; the third one down on the left is equivalent to the second one down on the right, and the last one on the left is the only one remaining on the right.
She made $40 last week because if you divide 80/2 it gives you 40. Because you are still counting the $5 she had spent.
