Answer:
we should take common first
3n+12
taking 3 common
3(n+4)
Usually this is around 10 feet<span> (</span>3 m)
These numbers are equal to each other, after a decimal you can add any number of zeros, but it will still be equal if all the other numbers match. :D
Answer:
The sample mean year is 1261 A.D.
The standard standard deviation is of 46 A.D.
Step-by-step explanation:
Sample mean:
Sum of all values divided by the number of values. So
Rounding to the nearest whole number, the sample mean year is 1261 A.D.
Sample standard deviation:
Square root of the sum of the difference squared between each value and the mean, divided by one less than the sample size. So
Rounding to the nearest whole number, the standard standard deviation year is of 46 A.D.