One solution contains 40% alcohol and another solution contains 70% alcohol. how many liter of each solution should be mixed to make 10.5 liters of a 60% alcohol solution?

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?