Please help me this is 8th grade math though PLEASE help me I don’t understand

See below (answers are in bold)

Step-by-step explanation:

Left rectangle:

P=2L+2W

P=2(n+0.6)+2(n)

P=2n+1.2+2n

P=4n+1.2

Right rectangle:

P=2L+2W

P=2(2n)+2(n+0.1)

P=4n+2n+0.2

P=6n+0.2

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.