Answer:
His brother will take 3.5 hours or 
hours to mow 21 lawns
Step-by-step explanation:
Given:
His brother mows 6 lawns in an hour.
To find the time his brother takes to mow 21 lawns.
Solution:
We will unitary method to find the time he will take to mow 21 lawns.
If 6 lawns are mowed in 1 hour
So, 1 lawn will me mowed in = 
hours.
Thus 21 lawns will be mowed in = 
hours.
Thus, his brother will take 3.5 hours or hours to mow 21 lawns
Range: largest number minus the smallest number
39 - 19 = 20
your range is 20
Mean: add all of the numbers and divide by the amount of numbers there are.
26+19+23+39+31+34+23+25= 220
220/8 = 27.5
your mean is 27.5
hope this helps
Answer:
The answer to this question is that the average rainfall varies by 0.07 each year.
Step-by-step explanation:
Answer:
2700!
Step-by-step explanation:
hope that helped <3
