Is the data in this graph better suited for a bar graph or a histogram?

2.5 milligrams is equivalent to how many grams

Which is the correct first step in finding the area of the base of a cylinder with a volume of 26x cubic meters and a height of 6.5 meters? v=bh 6.5=b(26x) v=bh v=26pi+(6.5) v=bh v=26pi(6.5) v=bh 26pi=b(6.5)

Will give a: 122 b: 90 c: 48 d: 180