What is the sum of the series? Write in expanded form making sure to show all steps used to find the sum

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula c= r/1.8 - 273, what is the temperature in celcius corresponding to r degrees rankine.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip