Answer:
A. 8
Step-by-step explanation:
We can write proportions to solve:
FM FI
---------- = ---------------
LK LA
Substituting the values
6 4
---------- = ---------------
12 LA
Using cross products
6 * LA = 4 * 12
6 LA = 48
Divide each side by 6
LA = 48/6
LA = 8
