Elena is planning to go camping for the weekend and has already spent $40 on supplies. She goes to the store and buys more supplies. Which inequality represents , the total amount in dollars that Elena spends on supplies? A: B: C: D:

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.