An exponent is shorthand for repeated multiplication.  for example, 
n4
=n·n·n·n.   in an exponential expression like ba, b is called the base and a is called the exponent.
expand each of the expressions below. for example, to expand
x3, you would write: x·x·x.

1. y7



2. 5(2m)3



3. (x3)2



4. 4x5y2



Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?