Answer:
50) 24.0
51) 58 miles
Step-by-step explanation:
50) To find a weighted average, multiply each number by the weight, then divide the total of all products by the sum of the weights. A graphing calculator or spreadsheet makes short work of this. It is a good idea to learn to use these tools. (See the attachment for a calculator solution.)
51) In a list that has an odd number of numbers, the median is the middle one when they're sorted in order (as here). The 4th number in this list of 7 numbers is 58, so that is the median. Units are miles.
