Andrew wants to know the difference in the masses of the granite and the quart samples shade the grids to find the difference

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

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class