PLEASE HELP ASAP! help is much appreciated

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

How do you write y-10=2 (x-8) in standard form