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8_murik_8 [283]
3 years ago
10

A circular disc has an area that measures between 1,650 and 1,700 square inches. What could be the length of its radius? Use 3.1

4 for pi.
A.23 in.
B.24 in.
C.25 in.
D.26 in.
Mathematics
2 answers:
EastWind [94]3 years ago
6 0
Well if it was exactly 1,650 it would be 22.9174892211877 or 22.917. If it was exactly 1,700 it would be 23.2621324584064 or 23.262.

Now to find our answer :

(Our observations)

• there is no 22
• there is only one number that is less than 23.262

Answer our question : From our observations we now can say that our answer is 23 inches because it is between 22.917 and 23.262.

Hoped I helped!
xxTIMURxx [149]3 years ago
5 0

we know that

the area of a circle is equal to

A=\pi r^{2}

where

r is the radius of the circle

Step 1

Find the radius for A=1,650\ in^{2}

A=\pi r^{2}

Solve for r

r=\sqrt{\frac{A}{\pi}}

substitute the value of area

r=\sqrt{\frac{1,650}{3.14}}=22.92\ in

Step 2

Find the radius for A=1,700\ in^{2}

A=\pi r^{2}

Solve for r

r=\sqrt{\frac{A}{\pi}}

substitute the value of area

r=\sqrt{\frac{1,700}{3.14}}=23.27\ in

therefore

the radius r

22.92\ in \leq r \leq 23.27\ in

<u>the answer is the option A</u>

23\ in

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