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abruzzese [7]
3 years ago
9

There are 24 fish in an aquarium. If 1/8 of them are tetras, and 2/3 of the remaining fish are guppies, how many guppies are in

the aquarium?
Mathematics
1 answer:
kiruha [24]3 years ago
8 0

Answer:

14 guppies

Step-by-step explanation:

1/8th of 24 is 3 which leaves 21 remaining

2/3 of 21 is 14 as each third is 7

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Step-by-step explanation:

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Julia spends $2.25 on gas for her lawn mower. She earns $15.00 mowing her neighbors lawn. What is Julia’s profit?
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Past experience indicates that the standard deviation of the time it takes for a dentist to perform dental scaling for patients
bagirrra123 [75]

Answer:

n = 110

Step-by-step explanation:

Margin of Error :

Zcritical * s/ sqrt(n)

s = standard deviation = 4

Margin of Error = ±0.75

Zcritical at 95% level of confidence = 1.96

Margin of Error = Zcritical * s/ sqrt(n)

0.75 = 1.96 * 4 / sqrt(n)

0.75 = 7.84 / sqrt(n)

Take the square of both sides

0.5625 = 61.4656 / n

0.5625 * n = 61.4656

0.5625 = 61.4656

n = 61.4656 / 0.5625

n = 109.27217

About 110 samples

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