How can the triangles be proven similar by the SAS
similarity theorem?

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

Pls! does anybody know a shortcut for answering these types of questions in the future?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?