Answer: Number of gallons of sulfuric acid is 45 gallons.
Step-by-step explanation:
Since we have given that
Total number of gallons of solution in a tank = 90 gallons
Percentage of sulfuric acid = 50%
We need to find the number of gallons of sulfuric acid;
Number of gallons of sulfuric acid is give by
[tex]\frac{50}{100}\times 90\\\\=0.5\times 90\\\\=45\ gallons[/tex]
Hence, number of gallons of sulfuric acid is 45 gallons.