In which direction should the motorboat head in order to reach a point on the opposite bank directly east from the starting point? (the boat's speed relative to the water remains 4.30

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the sunflower? ? plz write a proportion to solve i will give you 100 points