Answer:
A
Step-by-step explanation:
Answer:
2.5 gal would have to be replaced with 100% bleach to get the right concentration.
Step-by-step explanation:
If we drain X gal from the tank and we replace it with X gal of 100% bleach we will have in the tank: 80-X gal of 4% bleach and X gal of 100% bleach.
We can calculate the final concentration of the solution using a weighted average of the volumens where the weights are going to be the concentrations of each one:
(7%)×(80) = (4%)×(80-X) + (100%)×(X)
560 = 320-4X+100X
240 = 96X
X=2.5 gal
A. 3,000 In order to find out how many teachers divide 42,000 by 14
For the brownie one it’s C
For the train one it’s B
For the flour one it’s C
If u like use subtract and addition to it it would be 1089
