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The diameter of a newly discovered planet is approximately 3040 miles

Chemistry

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The diameter of a newly discovered planet is approximately 3040 miles. Find the distance around its equator. (Use 3.14 as an appropriate value). #2. The cook County Elementary School District noted that were 1780 pupils in the School district. How many teachers need to be employed in the district so that the average class size i under 25? ( Assume one teacher for each class). #3. Michael has scored 67, 81, and 97 on three tests in his chemistry course. He has one final test to take and want to obtain an average of 85 or more in the course. What possible values can be obtain on his final test and still achieve his goal? Also show check for this question. ****Need help solving this problem, please show work.