I need help ;-; whoever answers 1st will get brainliest

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?