The current balance of Finn’s checking account is $437.80. FInd the new balance after he writes a check for $39.56. Show your work

And explain how you got it so i can understand future problems : 3

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.