2.2.4 Practice: Modeling: Fitting Linear Models to Data does anyody have the answers to this? need them fast!!

In the diagram below what is the approximate length of the minor arc ab

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?

What 620000 divided by 10 to the third power