Question

After m months the height of a plant is 10 + 3m millimeters. How tall is the plant after 8 months? Three years?

Answer 1

A. 34 millimeters.

B. 118 millimeters.

Explanation:

We have been given that after m months the height of a plant is
`10+3m` millimeters.

To find the height of plant after 8 months we will substitute m=8 in our given expression.

`\text{The height of plant after 8 months}=10+3* 8`

`\text{The height of plant after 8 months}=10+24`

`\text{The height of plant after 8 months}=34`

Therefore, the height of plant after 8 months will be 34 millimeters.

B. Now let us find height of plant after 3 years.

First of all we will convert 3 years into months by multiplying 3 by 12 as 1 year equals to 12 months.

`\text{3 years}=3*12\text{ months}=36\text{ months}`

Now let us substitute m=36 in our given expression.

`\text{The height of plant after 36 months}=10+3* 36`

`\text{The height of plant after 36 months}=10+108`

`\text{The height of plant after 36 months}=118`

Therefore, the height of plant after 3 years (36 months) will be 118 millimeters.