Can there be a variable with a negative power under a square root?

In my math class we are learning about square roots, im sure its not that hard but my class is just so loud! Can anyone expla...

positive or negative 100? I thought positive, but my calculator says negative?

An inverse relationship has a negative slope value. True False

What is the latin root word for vapor? Is it temperature or atmosphere?

what is a three digit number that is a perfect square and a perfect cube?

How do I convert square feet to lineal yards?

(4-x)(x power 2 -9) ------------------------- (x-4)(x-3) Can anyone help me?

the difference between fixed costs and variable costs in a small company's business and should they do a change over from the...

Whats the square root of 250?

I have a TI - 83 Plus calculator or w/e... anyways, is there a way to type in negative exponents...? Is it the same way you d...