What is 7.2 times 4.2 rounded to the correct number of significant digits?

How much are you supposed to round it to?

Okay so if i'm understanding this correctly which I may not be.  If they are putting in $584 per month and with the account the bank will add 6% of what they are adding every month then this would be the problem

6% of $584 is 35.04 and 35.04 + 584 = 619.04 so every month they are putting in 619.04 then to find out how much they are putting in per year I just did 619.04 * 12 = 7428.48 so every year they are putting in 7428.48 but it wants to know how much money will be in the account in five years so that would be 7428.48 * 5 = 37142.4  By the way I'mm still not sure if this is how they want you to answer the questions but that is the answer I got.