Can someone me with these questions?

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?