7) A bag contains 12 red marbles. The ratio of red marbles to blue marbles is 4:3. Find
the number of blue marbles in the bag.
blue marbles

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)