Jose wants to make 6 qt. of a 54% saline solution by mixing together a 50% saline solution and a 60% saline solution. How much of each solution must he use? qt. of 50% solution, qt. of 60% solution

3.6 qt. and 2.4 qt respectively

Step-by-step explanation:

Let x be x% of 50% saline solution. And (100-x%) be the percentage of 60% saline solution.

54=x*(50/100)+(100-x)*(60/100), solving it we will get x=60%. So we need 3.6 qt. of 50% saline solution and 2.4 qt. of 60% saline solution

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation: