X -2.8 = 1.6
+2.8 +2.8 Add 2.8 on both side
x = 4.4
It would be; 90 * 20%
= 90 * 0.20
= 18
In short, Your Answer would be 18
Hope this helps!
Drops = 27
First, we need to find the volume of the given tank using the following equation

Now that we know the volume, we need to find out how many drops that we need to use. We can find that out using the following equation

Answer:
last one
Step-by-step explanation:
when u divide 3 and 4 is 0.75 and the only one the equals to that is 15/20