Answer:
A. 34 millimeters.
B. 118 millimeters.
Step-by-step explanation:
We have been given that after m months the height of a plant is [tex]10+3m[/tex] millimeters.
To find the height of plant after 8 months we will substitute m=8 in our given expression.
[tex]\text{The height of plant after 8 months}=10+3\times 8[/tex]
[tex]\text{The height of plant after 8 months}=10+24[/tex]
[tex]\text{The height of plant after 8 months}=34[/tex]
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.
[tex]\text{3 years}=3*12\text{ months}=36\text{ months}[/tex]
Now let us substitute m=36 in our given expression.
[tex]\text{The height of plant after 36 months}=10+3\times 36[/tex]
[tex]\text{The height of plant after 36 months}=10+108[/tex]
[tex]\text{The height of plant after 36 months}=118[/tex]
Therefore, the height of plant after 3 years (36 months) will be 118 millimeters.
