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3 years ago

Im marking brainliest who ever answers this

Mathematics

2 answers:

Novosadov [1.4K]3 years ago

5 0

Answer:

84%

Step-by-step explanation:

<u /> $\frac{21}{25}$

25 needs to be equal to 100, so it would need to be multiplied by 4.

So, do the same thing the numerator 21.

$\frac{84}{100}$

84/100 is equal to 84%

Advocard [28]3 years ago

4 0

Answer:

$\frac{21*4}{25*4} =\frac{84}{100}=84%$ %

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3 years ago

Is 0.725 greater then 0.75 decimals

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3 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

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2 years ago

Niklas takes a dose of 25 micrograms of a certain supplement each day. The supplement has a half life of 4 hours, meaning that 1

MrRa [10]

Answer:

The amount of the supplement in Niklas' body immediately after the 12th dose is 4.30 micrograms.

Step-by-step explanation:

Half life is the time required for an element to decay into half of its initial size. The supplement has a half life of 4 hours means that it decay to half of its size every 4 hours. Therefore there are 6 stages of division in a day.

i.e $\frac{1}{2}$ × $\frac{1}{2}$ × $\frac{1}{2}$ × $\frac{1}{2}$ × $\frac{1}{2}$ × $\frac{1}{2}$ = $\frac{1}{64}$

The amount of the supplement in Niklas' body after the first dose (first day) can be determined by;

= $\frac{1}{64}$ × 25

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He used the supplement daily for 12 days (12th dose), but the amount of the supplement in his body immediately after the 12th dose would be;

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= 0.390625 × 11

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The amount of the supplement in Niklas' body immediately after the 12th dose is 4.30 micrograms. This is because immediately after the 12th dose, the supplement has not reach its half life.

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