Do anyone know this? please

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

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.