Which one of these is a whole number?

a. 4/7
b. square root of 8
c.0
d.0.1

Abbey purchased a house using a fixed rate mortgage. the annual interest rate is 4.2% compounded monthly for 20 years. the mortgage amount is $235,000. what is the monthly payment on the mortgage? this isn't a multiple choice question have to show my work

Whats the name of the vertical axis

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?