In one year, a school uses 13,170 pieces of white paper, 6,570 fewer pieces of blue paper than white paper, and 3,300 fewer pieces of yellow paper than blue paper. How many pieces of paper does the school use in all? Solve on paper.

The school uses pieces of paper.

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

27 is what percent of 108? 27 is % of 108

Could someone with number 1 and 2