Figure 1 has 3 boxes and figure 2 has 5 boxes, it increases 2 boxes each figure. What figure number will have 42 boxes?

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank