Nassim buys petrol from his local garage. on Monday, he filled up his tank.
on Tuesday, his tank was 3/4 full
what fraction of the full tank of petrol did he use

What kinds of numbers have an odd number of factors?

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?