George spent 70 % of his saving to buy a camera. the camera cost $574 . how much did he originally have in savings?

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?