It takes megan 5 minutes to walk around the block 1 time. it takes her 10 minutes to walk around the block 2 times and 15 minutes to do it 3 times. how many minutes does it take megan to walk around the block 8 times?

Ameteorologist is studying the monthly rainfall in a section of the brazilian rainforest. she recorded the monthly rainfall, in inches, for last year. they were: 10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 fill in the missing values in the formula. what is the variance?