2 years ago

Helpppppp pleaseeee eses

Mathematics

1 answer:

Helen [10]2 years ago

8 0

Answer:

The hypotenuse is 7.62

Step-by-step explanation:

i just don't get what it means when it says "give answer as a decimal to 3 places"

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Priya drew a circle whose area is 25 cm. Dan drew a circle whose diameter is 4 times the radius of Priya's circle. How many time

Vitek1552 [10]

Answer:

400

Step-by-step explanation:

first work out the radius of priya's circle with the equation a = $\pi r^{2}$

$25 = \pi r^{2}$

$\frac{25}{\pi } = r^{2}$

$r = \sqrt{\frac{25}{\pi } }$

we know the diameter of a circle is 2 times the radius so the diameter of priya's circle is 2x $\sqrt{\frac{25}{\pi } }$

this means that if the diameter of dan's circle is 4 times bigger it must be

8x $\sqrt{\frac{25}{\pi } }$

to find the radius of dan's circle we divide the diameter by to 2 to give

4x $\sqrt{\frac{25}{\pi } }$

then use the a= $\pi r^{2}$ equation again

$a= (4 \sqrt{\frac{25}{\pi } })^{2} \pi$

which equals 400

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2 years ago

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masha68 [24]

Answer:

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Step-by-step explanation:

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2 years ago

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Illusion [34]

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3 years ago

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Sever21 [200]

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mote1985 [20]

Step-by-step explanation:

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