Help me plsss , I really need this answer

radius = 4, area =  50.25m  and  circumference =

Step-by-step explanation:

1.the radius of the circle is 4mm

because in the picture it was given the diameter of the circle and the radius is half of the diameter. so, 8/ 2 = 4  

2. to find the area of the circle we use the formula:

  = 3.14               ( r = radius )

so,

3.14*4*4 = 3.14 * 16 ( because 4*4 = 16 )

3.14 * 16 =

3. to find the circumference or the perimeter of the circle we use the formula:

  ( because 2 * 3.14 = 6.28)

whats the question?

step-by-step explanation:

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24