Can someone please give me the answers for these 3 ?!

How does a low unemployment rate affect a nation's economy? a. the nation has a higher number of productive resources. b. the nation can spend more money on for unemployed people. c. the nation can save money by paying lower salaries to a large workforce. reset

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?