Answer:
hope this helps:)
Step-by-step explanation:
Circumference
The diameter here is 0.4
so divide by two to get the radius
0.4/2 = 0.2
0.2 = r (radius)
so your answer depends on whether you use full (endlessly repeating pi) or partial (3.14) pi
Full pi -
assuming you're using full [tex]\pi[/tex] (pi) for this equation your answer would be 1.2566370614... since circumference = [tex]r2\pi[/tex]
3.14 pi -
assuming you're using 3.14 for pi your answer would then be 1.256 since your using 3.14 instead of full pi.
Area
area = [tex]\pi r^2[/tex]
r (radius) = 0.2
because of PEMDAS exponents are done first ([tex]r^2[/tex])
[tex]0.2^2[/tex] = 0.04
so your answer (again) depends on whether you use full (endlessly repeating pi) or partial (3.14) pi
Full pi -
assuming you're using full pi for this equation your answer would be 0.12566370614... since a = [tex]\pi r^2[/tex]
3.14 pi -
assuming you're using 3.14 for pi your answer would just be 0.1256
