An oak tree produces acorns at two different rates...?

Question

An oak tree produces acorns at two different rates. Until it reaches maturity, it produces an average of 900 acorns a year. Once it reaches full maturity, it produces an average of 2200 acorns a year. Angle Oak has produced about 2.9 million acorns in its lifetime. At what age did it reach maturity?

A. The tree reached maturity at 138 years.

B. The tree reached maturity at 188 years.

C. The tree reached maturity at 178 years.

D. The tree reached maturity at 148 years

Answer 1

How old is angle oak?