Answer:
A. 144 ft^3
Step-by-step explanation:
Let
S = sum of the data values
n = number of data values
The mean M is equal to
M = S/n
since you add up the values and divide by n. We don't need to know what S or n are.
If we add 5 to each data value, then we're adding on n copies of 5, or 5n
The new mean N is
N = (S+5n)/(n)
N = (S/n) + (5n/n)
N = M + 5
The new mean is a result of taking the old mean M and adding on 5
So,
N = M+5
N = 10+5
N = 15
The standard deviation will remain the same because each data value hasn't moved in relation to one another. Every data value has been shifted up the same amount. For instance if A and B are two points in this data set, then A+5 and B+5 will be the same distance away. Apply this logic to any number of data values. While standard deviation isn't that simple, it still has a loose connection to "distance" of the values, or how spread out they are.
So that's why the final answer is choice C)
Answer:
Step-by-step explanation:
4 mins to clear the table
He eats existing 12 muffins is 2 mins by then 8 muffins are baked, another minute to eat 6 muffins and by then there are 4 more muffins totalling to 6. He finishes that in another min (4 mins) and leaves but aunt placed 4 more on the table after he left.
Answer: he spent 192 minutes at the farm
Step-by-step explanation:
one hour is equal to 60 minutes and as he spent 3 hours in the farm so
3x60=180
and then an additional 12 minutes
180+12+= 192
192 minutes