I need help with 16, 17, 18, 19, 20 & 21 please.

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Formulate the indicated conclusion in nontechnical terms. be sure to address the original claim. the foundation chair for a hospital claims that the mean number of filled overnight beds is over 523, and she is therefore justified starting a funding campaign to add a wing to the hospital. assuming that a hypothesis test has been conducted and that the conclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms.