All i need to know is how to do 13. after i know how to do 13, i'll know how to do the rest. show your work and explain if you know the answer! you.

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Let event a = you roll an even number on the first cube. let event b = you roll a 6 on the second cube. are the events independent or dependent? why?