Answer:
You will need 220 mL of the 60% solution and 80 mL of pure alcohol.
Step-by-step explanation:
Let 'x' be the amount of 50% alcohol solution and y the amount of pure alcohol.
Therefore:
(0.5x + y)/300 = 0.65 ⇒ 0.5x + y = 190
x + y = 300
Solving the sistem of equations:
x = 220 and y = 080
Therefore, You will need
220 mL of the 60% solution
and 80 mL of pure alcohol.
A(t)=4000(1+5.5/100)^4 choice 4955.30
I doesn’t let me see the photo I’m very good at this but I just don’t understand your question
Answer:

Step-by-step explanation:
Answer:
The second one
Step-by-step explanation: