C=40squared+35squared minus 2 times40 times 35cos(50)? the answer to this is then square rooted but i cant figure it out

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

Which shows a reasonable estimation for 124% of 42 using the distributive property?

Aresearch study is done to find the average age of all u. s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample