anonymous
  • anonymous
Can anyone tell me if A is the correct answer?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
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anonymous
  • anonymous
yrelhan4
  • yrelhan4
28.26/3.14 gievs you radius^2.. A=pir^2.. so r^2=9 r=3 diameter=2r=2*3=6
yrelhan4
  • yrelhan4
Should be B..

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whpalmer4
  • whpalmer4
Area of a circle = \[A=\pi r^2\]Diameter is twice the radius, or \(d = 2*r\) which means \(r = d/2\) Substitute in the area formula: \[A = \pi (\frac{d}{2})^2 = \frac{\pi}{4}d^2\]We know that \[A=28.26\] so we can rearrange the formula to give \(d\) \[\frac{4A}{\pi}=d^2\]\[d = \sqrt{\frac{4A}{\pi}}\]Plug in the numbers...
whpalmer4
  • whpalmer4
Just eyeballing it, I'd say "area is 28, divide that by pi (a bit more than 3) is 9, square root of 9 is 3, and that's the radius so we double it for the diameter and get 6"
whpalmer4
  • whpalmer4
Proficiency estimating the area of circles is quite useful when deciding whether buying 2 medium pizzas or 1 large is a better deal :-)
anonymous
  • anonymous
So B is the correct answer!!! Thanks a lot!!!

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