As President of Spirit Club, Tiana organized a "Day of Decades" fundraiser where students could pay a fixed amount to dress up as their favorite decade. Of the 8 students who participated, 6 of them dressed up as the '70s. If Tiana randomly chose 4 of the participants to take pictures of for the yearbook, what is the probability that all of them dressed up as the '70s?

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Find the area of the unshaded square

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.