What is the equation of a circle centered at the origin with radius 20? a. x3 + y3 = 400 b. x3 + y3 = 20 c. x2 + y2 = 20 d. x2 + y2 = 400

How to use order of operation in 20 divide by 4 multiply 5 = 1

Kerion has a beaded necklace business. she can make 12 necklaces is 2 hours. how long will it take her to make 9 necklaces?

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?