How do you use the halving and doubling strategy to find 28*50?

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

Is a positive integer raised to a negative power always positive

Ihave trouble finding the nth term of a linear sequence