10 points and brainliest urgent math question see picture

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

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.

The area of square garden is 300m squared. how long is the diagonal?