Molly spent $15.60 on school supplies. She bought a binden for $3.40, dividers for $1.98, lunchbox for $8.60 and two identical folders. How much did each folder costs

Each folder was 81 cents

Step-by-step explanation:

First we subtract the given values from 15.6 to find out how much she has left when she buys the folders.

15.6-3.4-1.98-8.6=1.62

She has $1.62 remaining and she buy two identical folders. That means both were at the same price. So we just need to divide by two to find the cost of each individual folder.

1.62/2=.81

Each folder was 81 cents

77% of the school want electronic newsletters, so 23% of the school want physical paper newsletters.

77% of 650 is 500.5.
23% of 650 is 149.5.

650/100 = 6.5
6.5x77 = 500.5
6.5x23 = 149.5

It's best to round that figure up to 150 as there will not be a parent who only needs half of the newsletter.