Asoccer ball that regularly sells for $16.50 is on sale for 20% off. what is the amount of the discount? (explain answer) a. $0.33 b. $0.65 c. $3.30 d. $6.50

Me with this one question, and i'll upvote the brainliest answer

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!