1+1I need help and fast i've been trying to solve this one for 30 minutes now.

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

Charlie tosses five coins. what is the probability that all five coins will land tails up.