If the number 85 is removed from a finite collection of numbers, the collection's average decreases by 1. If the number 74 is removed from the remaining collection, the collection's average does not change. How many numbers were in the original collection?​

Analyze the data sets below. data set a 25,25,25,26,26,26,27,28,28,29,30,31,31,32,33,33,34,35,35,35 data set b 25,25,25,26,26,26,26,27,27,27,27,28,28,29,29,30,31,31,32,34 which of the following statement are true? select all that apply. a. data set a is relatively symmetric and data set b is skewed left. b.the means of the data sets are within 3 units from eachother. c.the data sets have the same standard deviation. d.the mean of data set a is 27.95 and the mean of data set b is 30. e. the data set b has a higher standard deviation than data set a. f. the mean and median of data set a are close in value.

Acircle has a circumference of 7.850 units. what is its radius?

Which of the following vectors are orthogonal to (2,1)? check all that apply