Answer:
Not totally sure if i'm reading the question right buuuut;
the answer is (I think) a poplar would reach 40 feet high in 5 years, while the red maple would reach the goal in 8.
Explanation:
using division, 40/8 = 5 years
40/ 5 = 8 years.
like I said, not positive I read the question correctly but I hope this helps xx have a nice day :)