If the circumference of my circle is 25 inches and the diameter is 8 inches. how would i get 3.14

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Which expression is not a polynomial?