12) i can run 3.6 miles in 30
minutes. how far can i run in
1.5 hours?

How do i multiply two digit numbers

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

Is a triangle with sides of length 6ft, 21 ft, 23 ft. a right triangle?