The variance for the sample is 25
For given question,
We have been given the sample size n = 21
and the sum of squares is SS = 500
We need to find the variance for the sample.
We know that the variance is mathematically represented as,
Substituting given values in the above formula,
= 500 / 20
= 25
So, the variance is 25
Therefore, the variance for the sample is 25
Learn more about the variance here:
brainly.com/question/15729903
#SPJ4
Using the together rate, it is found that they would prepare the solution in 1.71 minutes working together.
<h3>What is the together rate?</h3>
It is the sum of each separate rate.
In this problem, the rates are given by:
Hence the together rate is given by:
7x = 12
x = 12/7
x = 1.71.
They would prepare the solution in 1.71 minutes working together.
More can be learned about the together rate at brainly.com/question/25159431
#SPJ1
Answer:
135 pennies
Step-by-step explanation:
x= pennies in the door at the start
x-1/3x-1/3(x-1/3x)-1/3(x-1/3x-1/3(x-1/3x))=40
x = 135
Proof:
135-45-20 =40
135-45=90
90=30=60
60-20=40
Answer:
11.25
Step-by-step explanation:
Theres your answer
Answer:
The general solution to this differential equation is
Step-by-step explanation:
We are given the following differential equation:
Solving by separation of variables:
Integrating both sides:
On the left side, by substitution, u = kP - h, du = kDp, Dp = du/k. Then
In which K is the constant of integration.
The general solution to this differential equation is