Two cranes are lifting building materials on top of a roof. Crane A lifts a steel
beam all the way to the top of the roof in 30 seconds, while crane B lifts an
identical beam three-quarters of the way up to the roof in 30 seconds too.
Which of the following statements is true?

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?