(7 x 10^8)(8.2 x 10^-3)? I need something like this as an __ x 10^__

What is the anwers for 9+2x=5x-3-x

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

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!