Measures of variability are used to characterize how the data are around the of the distribution.

Measures of variability are used to characterize how the data are spread around the mean of the distribution.

Step-by-step explanation:The measures of average such as the median and mean represent the typical value for a dataset.However , In the dataset the actual values usually differ from one another and from the average value itself.

In this case the measure of spread, sometimes also called a measure of dispersion, is used to describe the variability in a sample or population around the mean .

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.