Answer:
sa (surface area) =

Step-by-step explanation:
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Rectangle. I hope this helps.
We are asked to describe into one term the definition "procedure for selecting sample elements from a total set of observations." The answer is sampling method. Sampling method is a method used by researchers to evaluate a large size of correspondents or samples such that the representive sample is still considered.
The runner ran 5/6 then he ran 9/10 more how much did he run in all