Added pic and answers. help plz

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound

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.