5 years because when you divide 90 by 18 to get how many years it takes the tree to grow to 90 inches tall, you get 5.
Answer:
y = 12
Step-by-step explanation:
y = 3x2+6
= 6+6
= 12
r= 3 h = 6 then use 3^2 + 6^2 = l^2
Answer: 37%
