Mai has 40 tens. write how many hundreds. write the number

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

Asap! i'm not good math and i'm lost.