I need help ill mark brainliest if you do them all

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?

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!