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Ostrovityanka [42]
3 years ago
10

A clock's minute hand travels one full circle each hour. A particular clock's minute hand is 10.2 cm. What is the approximate ar

ea covered by that minute hand in 3 hours? Use 3.14 for π . 192.17 cm² 326.69 cm² 980.06 cm²
Mathematics
1 answer:
Step2247 [10]3 years ago
8 0
<h3>Answer:  980.06 cm²</h3>

Explanation:

We need to find the area of a full circle with radius 10.2 cm

A = pi*r^2

A = 3.14*(10.2)^2

A = 326.6856

This is the approximate amount of area the minute hand covers in 1 hour.

In 3 hours, it covers 3 times that amount.

3*326.6856 = 980.0568

That rounds to 980.06

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Dafna11 [192]

Answer: R' = (3\frac{1}{3} ,1\frac{2}{3}), S' = (3\frac{1}{3} ,-3\frac{1}{3}), T' = (-1\frac{2}{3} ,-3\frac{1}{3})

<u>Step-by-step explanation:</u>

R = (2, 1)  ⇒  R' = (\frac{5}{3})2 , (\frac{5}{3})1 = (\frac{10}{3} , \frac{5}{3})

S = (2, -2)  ⇒  S' = (\frac{5}{3})2 , (\frac{5}{3})(-2) = (\frac{10}{3} , \frac{-10}{3})

T = (-1, -2)  ⇒  T' = (\frac{5}{3})(-1) , (\frac{5}{3})(-2) = (\frac{-5}{3} , \frac{-10}{3})

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