Question A researcher has saline solutions with concentrations of 8% and 14%. He wants to mix some of each solution to get 66 ounces of solution with a 10% concentration. How many ounce of each solution does he need to mix together?

Hi I have a question.

You need a 50% alcohol solution. On hand, you have a 500 mL of a 95% alcohol mixture. How much pure water will you need to add to obtain the desired solution?

Mr. and Mrs. Wagner are getting ready to drive across the US from Philadelphia, PA to Los Angeles, CA over five (5) days. The TOTAL distance is approximately 3,000 miles. The average price of gasoline is $4.10 per gallon. They plan to stay in a hotel four (4) nights. They are budgeting $50 per day per person to cover the cost of three (3) meals per day each.    If their van averages 25 mpg, estimate how many gallons of gasoline are needed for the trip. Select the correct answer below.