Demarcus has at least $8 more than his older sister. his older sister had $4. which of the following inequalities could be used to find how much money m demarcus has?

Where d=Demarcus' money:

4 ≤ d+8

The definition of variability in math is, basically, the extent of which certain points of data diverge from normal or average. According to this, the intequartile range would be the most helpful in determining the variability in chapter length. Also, the Range and Median would be helpful, to a much smaller extent though.