Sam music teacher told him to practice his trombone for 5/10 of an hour he's been 2/6 of an hour practicing did he practice long enough?

No

Step-by-step explanation: He was supposed to practice for 30 mins. He only practiced for 20 mins.

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.

i'm not entirely sure

step-by-step explanation:

if you ask home depot or lowe's they might be able to you out