Round 5540.33990183 to 3 decimal places

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?