Use the formula.much easier.
Answer:

Step-by-step explanation:
we have

we know that



substitute the values in the expression above

Combine like terms

<span>A 2% solution of chlorohexidine added to 126 oz of water. The total oz 128.
Solute: chlorohexidine, 2%=0.02
solvent: water (0%)
Concentration, C, volume V
CV=c1v1+c2v1
128C=0.02*2 + 0.00*126 = 0.04
Concentration
C=0.04/128 = 0.0003125 = 0.03125%</span>
Answer:
41 degrees
Step-by-step explanation:
Angles in a triangle add to 180 degrees, so angle A is 180-108-31=41 degrees.
The square root of 18 must be 4.2 to the nearest tenth.