This figure consists of a rectangle and semicircle. what is the perimeter of this figure? use 3.14 for pi.

Perimeter of figure = 3 sides of rectangle + perimeter of semi-circle.

3 sides of rectangle = 15 + 12 + 15 = 42 

Perimeter of semi-circle = πr = 3.14 * 6 = 18.84

In short, Your Answer would be: 42 + 18.84 = 60.84 m

Hope this helps!

Circle:
12m = diameter
 
Circumference of a circle:
C = d * pi
C = 12m * 3.14
C = 37.68m

Then cut it in half because the whole circle isn't a part of the outside (only half is) You'd get 18.84m.
 
Rectangle:
Is 12m by 15m.

Circumference of a rectangle:
C = 2L + 2W
C = 2(12m) + 2(15m)
C = 24m + 30m
C = 54m.
C = 54m - 12m = 42m.

Now add the answer of the circle and answer of the rectangle to get 60.84.

a - base

b - exponent

so,

the base is 8the exponent is 3the exponent tells you to multiply 8 together three timesthe expanded form is 8*8*8