Answer:
22
Step-by-step explanation:
mean is calculated as
mean = 
Given the mean of 12 numbers is 20 , then
= 20 ( multiply both sides by 12 )
sum = 240
Given the mean of 8 numbers is 25 , then
= 25 ( multiply both sides by 8 )
sum = 200
Total sum of the 20 numbers = 240 + 200 = 440, then mean of 20 numbers is
mean =
= 22
The square root of 58 is:

Hope this helped! c:
Antoine sleep 8 hours in a day
the first one is a quadrilateral
Step-by-step explanation:
a quadrilateral have four side