3 years ago

Find all the perfect numbers between 20 and 30

Mathematics

1 answer:

dsp733 years ago

7 0

A perfect number is a natural number whose factors add to the original number.

6 is a good example of this, as 6 = 1 + 2 + 3.

The perfect number between 20 and 30 is 28: 28 = 1 + 2 + 4 + 7 + 14.

-Hope this helped! :D

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Vanyuwa [196]

Answers:

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169

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6

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<em>i hope this helps, good luck :)</em>

3 0

3 years ago

Read 2 more answers

the leaning tower of pisa in italy makes an angle of 86 degrees with the ground. a person standing on the ground approximately 8

Art [367]

See the picture to better understand the problem

we know that
in the triangle ABC
∠A+∠B+∠C=180°
∠C=180-(86+69)-----> ∠C=25°
Applying the law of sines
b/sin B=c/sin C------> b=c*sin B/sin C-----> b=82*sin 69/sin 25
b=181.14 ft

the answer is
181.14 ft