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
Answer:
15.6?
Step-by-step explanation:
If you would square it then you would get 15.6.
Answer:
3960 feet
Step-by-step explanation:
A = 1/2 h (a+b)
A / 1/2 h = a + b
A / 1/2 h - b = a
a = A / 1/2 h - b
Hope this helps
Answer:
d, 700
Step-by-step explanation:
it's the only one that makes sense