2. Suppose a 15-minute call costs $5.26, and a 30-minute call costs $10.24. Find a formula relating time (in minutes)
and cost (in dollars).

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

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

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?