Help! My question is in a link, but when I post the question, it gets deleted almost instantly. Where can I post a link?

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

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?

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.