To find the mean you have to get the average number found by adding all data points and dividing by the number of data points.
Example: The mean of 4, 1, and 7 is (4+1+7)/3 = 12/3 = 4
For median you have to get the middle number which is found by ordering all data points and picking out the one in the middle (or if there are two middle numbers, taking the mean of those two numbers).
Example: The median of 4, 1, and 7 is 4
because when the numbers are put in order (1, 4, 7) the number 4 is in the middle.
To get the mode you have to get the most frequent number which is, the number that occurs the highest number of times.
Example: The mode of {4,2,4,3,2,2} is 2 because it occurs three times, which is more than any other number.
Hope that helps.
Answer:
I used my calculator and it says c=16n-t+2b
Answer:
Step-by-step explanation:
Assuming that the tank is only for agricultural use, also no significant leakages then at the end of the day, the amount consumed will be equivalent to 
For 5 days, the quantity reduces by 9.5*5=47.5 gallons
Therefore, the barrel would have changed by
