1) there are 60 minutes in an hour, and so she spends 180 minutes doing homework
180 + 30 + 35 = 180 + 65 = 245 minutes in all
2) 0.18 x 3663 = 659.34 x 4 = $2637.36
3) 2170/5 = 434
4) 100/2 = 50/2 = 25 Kevin has 25 dollars left (50 on games, 25 on music)
5) 4800 x 0.53 = 2544 it would cost Cheryl $2544 dollars to mail all of them
she would need 44 more dollars
hope this helps