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.
 
        
             
        
        
        
Answer: (6x-3y)3 or maybe not possible to do
Step-by-step explanation
multiply 3x2 and get 6. Multiply 3x3 and get 9. 
 
        
                    
             
        
        
        
Answer:
70
Step-by-step explanation:
Evaluate 3 b^2 - b where b = 5:
3 b^2 - b = 3×5^2 - 5
Hint: | Evaluate 5^2.
5^2 = 25:
3×25 - 5
Hint: | Multiply 3 and 25 together.
3×25 = 75:
75 - 5
Hint: | Subtract 5 from 75.
 | 7 | 5
- | | 5
 | 7 | 0:
Answer:  70
 
        
             
        
        
        
Answer:
2π/5
Step-by-step explanation: