Answer:
Therefore the rate of growth of the tree is 33 cm/ yr.
Step-by-step explanation:
Given that,
The height of the tree is
H= 210 +33t
Here H represent the height of tree in cm and t is time in year.
The rate of growth is the first order derivative of the H with respect to time.
i.e The rate of growth 
∴H= 210 +33t
Differentiating with respect to t


Therefore the rate of growth of the tree is 33 cm/ yr.
a flat figure with 4 equal straight sides and four right angles
Wait are you going to send a picture to fully show us what the question is about
7) y = 4x
8) y = 7x/8
9) y = 25x/3
I think this are the answers.
I'd say the bottom answer is the best answer