3: multiply the change per minute by how many minutes: 3.1x15=46.5. 5: Is your opinion, I can't tell you how to feel. But a negative times a negative is a positive, so if there is an even number of negatives no matter how many positives there are it will be positive, if there is an odd number of negatives it will be negative. :) Hope this helps!
The actual value = 25.7 ml
The error = 15.6%
This means that the value of error = 0.156 * 25.7 = 4.0092 ml
Now, the error percentage found means that the student got the value either greater than the actual one with the value of error or less than the actual one with the value of error.
This means that the two possible readings are:
either : 25.7 + 4.0092 = 29.7092 ml
or : 25.7 - 4.0092 = 21.6908 ml
I don't know if you know something called PEMDAS
Parentheses
Exponent
Multiply
Divide
Add
Subtract
So you would do the -2(-7) first giving you 14
So now we have -62/12 +14
now you would do -62/12 giving you -5.16666667
and now the equation is -5.16666667 + 14 = 8.83333333
I know for a fact, being in Calculus Honors, that what I did to simplify is correct. Using the Order of Operations, or PEMDAS (Commonly remebered as "Please Excuse My Dear Aunt Sally<span>". It stands for "Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction".) to simplify this answer is necessary.
If your teacher wrote this problem please inform him or her of Order of Operations before your classmates use it even though its wrong.</span>
The variance (σ^2) is the square of the differences between the mean and each data.
The problem says that the program reports a mean of 31.5 and a standard deviation of 2.5, so you have to elevate the standar deviation to the power 2:
σ^2 = (2.5)^2
σ^2 = 6.30
<span>
What is the variance of the data?
</span> The variance of the data is 6.30, so the the correct option is D.
