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3 years ago

What is the best estimate for the answer to 321.786 + 240.273?

Mathematics

1 answer:

zvonat [6]3 years ago

3 0

Round
321.786 is about 322
240.23 is about 240
322+240=562
about 562

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Answer:10,486 contestants

Step-by-step explanation:

First day:

Total number of contestants at the beginning = 50,000

After first day, 20% 0f 50,000 are removed.

That is, (20/100)×50,000 = 10,000

Contestants remaining after first day = 50,000-10,000 = 40,000

Second day:

Contestants= 40,000

20% removed

That is (20/100)×40000=8000

Balance =40000-8000=32,000

Third day:

Contestants= 32000

20% removed

That is (20/100)×32000=6400

Balance =32000-6400=25,600

Fouth day:

Contestants= 25,600

20% removed

That is (20/100)×25,600=5,120

Balance =25,600-5,120=20,480

Fifth day:

Contestants= 20,480

20% removed

That is (20/100)×20,480=4096

Balance =20,480-4096=16,384

Sixth day:

Contestants= 16,384

20% removed

That is (20/100)×16,384=3276.8

Balance =16,384-3276.8=13,107.2

Seventh day:

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Balance =13107.2-2621.44=10485.76

Therefore, number of contestants remaining after one week equals 10,486.

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3 years ago

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Answer:

Step-by-step explanation:

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<h2>formula: π r²h</h2>

R= 8.75in

h=43.12in

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=> 3.14x76.5625x43.12

3.14x 3301.375

<em>i think it is correct </em>

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