If the difference between the exterior angle of a n sided regular polygon and an (n 1) sided regular polygon is 12. find the value of n.

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?