Challenge. a chemist has a solution that is 20% peroxide and another solution
that is 70% peroxide. she wishes to make 100 l of a solution that is
35% peroxide. how much of each solution should she use?

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.

Which of these choices show a pair of equivalent expressions?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)