Answer:
900
Step-by-step explanation:
1. Mean.

2. <span>Standard deviation.
First we have to square each value and calculate the mean of that squares:

so the variance:

and the standard deviation:

</span>
Answer:
12/100 is 0.12
Step-by-step explanation:0. tenths, hundredths, thousandths
The slope is 2 and negative 4 and that divided would be -1/2