Need help on these 2 questions!

Rewrite the following without an exponent. (5/8)-1

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is

Who long does it take to drive 150 miles at 45 miles per hour