Answer:
The types of trees that Logan genetically engineered are fir trees <u>9 meters</u> tall and pine trees <u>12 meters</u> tall.
Step-by-step explanation:
Given:
The combined height of one fir tree and one pine tree is 21 meters.
The height of 4 fir trees stacked on top of each other is 24 meters taller than one pine tree.
Now, to find the height of types of trees that Logan genetically engineered.
<em>Let the height of fir tree be </em>
<em />
<em>And let the height of pine tree be </em>
<em />
So, the combined height of both the trees:

As given, the height of 4 fir trees stacked on top of each other is 24 meters taller than one pine tree.
Thus,

Now, substituting the value of
from equation (1):

<em />
<em />
<em>Subtracting both sides by 24 we get:</em>
<em />
<em />
<em>Adding both sides by </em>
<em> we get:</em>
<em />
<em />
<em>Dividing both sides by 5 we get:</em>

<u>The height of pine trees = 12 meters.</u>
Now, substituting the value of
in equation to get the height of fir trees:

<u>The height of fir trees = 9 meters.</u>
Therefore, the types of trees that Logan genetically engineered are fir trees 9 meters tall and pine trees 12 meters tall.