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Butoxors [25]
3 years ago
8

An archery target consists of an inner circle and four concentric rings. The width of each ring is equal to the radius r of the

inner circle. Enter a rational expression in terms of r that represents the probability that an arrow hitting the target at random will land in the inner circle. Then simplify the expression.
Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
4 0

Answer:

0.4

Step-by-step explanation:

Radius of inner circle = r

Radius of entire circle = r + r + r + r + r = 5r

Probability that an arrow hitting the target will land on inner circle ;

Area of inner circle / area of entire circle

Recall :

Area of circle = πr²

Hence ;

πr² / π(5r)²  = πr² / π25r² = 1 / 25 = 0.4

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