Hey guys, I just need some quick help! Can anyone explain to me how to find the square root of this number... or pretty much any other number in general?

Like, I know for a fact that this is 4. But my teacher stated that I cannot find the square root of a negative number. This, for some reason, turns to a POSITIVE 4 and I just do not understand why. Can you guys, like, you know, explain?

The surface area (sa) of a cube with a as the length of each of its sides is given by the formula . if the surface area is known, how can you rewrite the formula to find its side?

The bake stars picked 907 apples last weekend at a local orchard they made caramel apples and sold them in the bakery in trays of 6

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.