What is the range of the function of the domain is restricted to [-3 ,1]

What number produces an irrational number when multiplied by -1.25

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)