A middle school took all of its 6th grade students on a field trip to see a play at a theater that has 2760 seats. The students filled 45% of the seats in the theater. How many 6th graders went on the trip?

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.

1. what is the measure of ∠abc? what is the measure of ∠abd?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)