GIVING AWAY 100 POINTS FOR WHOEVER ANSWERS ALL QUESTIONS(+brainest)

The amount of energy it takes to lift a box might be a function of which of the following

Given: ab ≅ bc and ao ≅ oc ok − angle bisector of ∠boc find: m∠aok

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?