Production turn's rejection percent of twenty (20) percent is represented by fourty (40) tons of rejects. the total tons produced is*

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

An account with a $250 balance accrues 2% annually. if no deposits or withdrawals are made, which graph can be used to determine approximately how many years will it take for the balance to be $282? it's e2020 ni️️as