{8,12,16,20,...,48} in set builder notation

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Asquare is dilated by a scale factor of 1.25 to create a new square. how does the area of the new square compare with the area of the original square? a)the area of the new square is 1.25 times the area of the original square. b)the area of the new square is 2.50 times the area of the original square. c)the area of the new square is 1.252 times the area of the original square. d)the area of the new square is 1.253 times the area of the original square.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.