Needed in math anyone will be great

This is so hard and it’s for a test

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

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 plzzz write a proportion i will give you 100 points