Given:
It is given that after m months the height of a plant is 10+3m how tall is the plant after 8 months and after 3 years .
Soluions:
Now, after 8 months the height of tree will be

So, height after 8 months is 34 .
Now, in 3 years we have 36 months so, height after 3years will be

So, height after 3 years is 118.