What's the geometric mean of 13 and 17?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

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

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the