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Allisa [31]
2 years ago
14

 A lawn sprinkler sprays water in a circular area of grass. The diameter of the circular area of grass is 15 ft.   What is the a

rea that this sprinkler sprays with water?
​
Mathematics
1 answer:
kykrilka [37]2 years ago
7 0

Answer:

56.25\pift² or 176.715 ft²... it depends of if you round or not

Step-by-step explanation:

area = πr², r=7.5, 7.5*7.5=56.25

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Answer:

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Step-by-step explanation:

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3 years ago
Find the fifth roots of 243(cos 240° + i sin 240°).
Mazyrski [523]

Answer:

See below.

Step-by-step explanation:

Fifth root of 243 = 3,

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Equating equal parts and using de Moivre's theorem:

r^5 =243  and  cos  5Ф  + i sin  5Ф = cos 240 + i sin 240

r = 3 and  5Ф = 240 +360p so Ф =  48 + 72p

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3(cos 192 + i sin 192),

3(cos 264 + i sin 264),

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