Anyone can help out with the answer??

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Find the value of x for which line a is parallel to line b

How many times larger is 6 × 10^12 than 2 × 10^7? a. 30,000 b. 3,000 c. 3,000,000 d. 300,000