2 years ago

How are fractions related to decimals

Mathematics

2 answers:

masya89 [10]2 years ago

8 0

You can turn a decimal into a fraction or a fraction into a decimal

irina1246 [14]2 years ago

6 0

Fractions and decimals can be written as a percent

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9) Round 9.053 to the nearest tenth.

Margarita [4]

Step-by-step explanation:

9.1

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If 37 represents an increase of 37, what does -37 represents

Genrish500 [490]

Probs a decrease of 37 boiiii

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The core melt- down and explosions at the nuclear reactor in Chernobyl in 1986 released large amounts of strontium-90, which dec

elena-14-01-66 [18.8K]

If $S(t)$ is the amount of strontium-90 present in the area in year $t$ , and it decays at a rate of 2.5% per year, then

$S(t+1)=(1-0.025)S(t)=0.975S(t)$

Let $S(0)=s$ be the starting amount immediately after the nuclear reactor explodes. Then

$S(t+1)=0.975S(t)=0.975^2S(t-1)=0.975^3S(t-2)=\cdots=0.975^{t+1}S(0)$

or simply

$S(t)=0.975^ts$

So that after 50 years, the amount of strontium-90 that remains is approximately

$S(50)=0.975^{50}s\approx0.282s$

or about 28% of the original amount.

We can confirm this another way; recall the exponential decay formula,

$S(t)=se^{kt}$

where $t$ is measured in years. We're told that 2.5% of the starting amount $s$ decays after 1 year, so that

$0.975s=se^k\implies k=\ln0.975$

Then after 50 years, we have

$S(50)=se^{50k}\approx0.282s$

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A recipe for a loaf of bread calls for of a cup of flour. If Milo used 12 cups of flour, how many loaves of bread did he prepare

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Answer:

D) 12 loaves

Step-by-step explanation:

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The answer to your question is 37.5.

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