2 years ago

A circular garden has a radius of 3 meters. What is the area of the garden? Write your answer using π. Show your work.

Mathematics

1 answer:

Gwar [14]2 years ago

7 0

Answer: 9 $\pi$

Step-by-step explanation:

Sorry the pi sign looks weird. The formula for area of a circle is $a=\pi r^2$ , so we have to substitute the radius with 3. The square of 3 is 9, so the answer is 9pi.

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Vladimir [108]

People in building ---- x (men, women and children)
children --- y
men + women + children = x
(3/7)x + (5/8)(4/7)x + y = x
3x/7 + 5x/14 + y = x
times 14
6x + 5x + 14y = 14x
14y = 3x

y + 220 =x
sub into the other one
14y = 3(y+220)
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So we have 280 people in the building.

check: 3/7 of 280 are men = 120
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so we have 120 men, 100 women and 60 children!

hope this is right! have a great. day

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