Which statement best describes the conditions for f (2) = a(6)* to be a model for exponential growth?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

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

Factor and solve to find roots x squared -x - 90 =0