Sumiko must study at 10 hours each week. she has studied 4 hours already. how many hours must she study ?

Since she had already studied 10 hours, and she has to study 4 more. It is 10 hours minus 4 hours she already studied. So the expression is 10-4= ___ and the answer would be 6 more hours that she needs to study.If this is right could you possibly give me brainliest? Hope this helped.

answer is c

step-by-step explanation:

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.