Hi student, let me help you out! :)
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First of all, let's find the area of the circle with the help of the formula [tex]\mathrm{A=\pi r^2}[/tex], where A=area, π=pi, 3.14, and r=radius; the 2 above the radius tells us to multiply the radius times itself.
Now we realise we have a slight problem here. We have the diameter and not the radius!
No need to panic. We can divide the diameter by 2 and find the radius:
[tex]\mathrm{8\div2=4}[/tex]. Now we substitute 4 for the radius and solve for area:
[tex]\mathrm{A=\pi (4)^2}[/tex]. Square the radius first:
[tex]\mathrm{A=16\pi }[/tex]. Now recall that pi is 3.14:
[tex]\mathrm{A=3.14\times16}[/tex]. So the area is [tex]\bigstar\underline{\boxed{\mathrm{A=50.24\:m^2}}}[/tex].
Hope it helped you out, ask in comments if any queries arise.
