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melisa1 [442]
4 years ago
7

Solve 7.8+3.5w-1.5 for w = 6.8 using PEMDAS

Mathematics
1 answer:
VikaD [51]4 years ago
5 0
7.8+3.5(6.8)-1.5
7.8+23.8-1.5
31.6-1.5
30.1
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Using an exponential function, it is found that 4 mg of the substance would still be left after 32 days.

<h3>What is an exponential function?</h3>

A decaying exponential function is modeled by:

A(t) = A(0)(1 - r)^t

In which:

  • A(0) is the initial value.
  • r is the decay rate, as a decimal.

In this problem, considering that the initial amount if of 64 mg, and we are working with half-lifes, the equation is given by:

A(t) = 64(0.5)^t

32 days is 32/8 = 4 half-lifes, hence the amount remaining in mg is given by:

A(4) = 64(0.5)^4 = 4

More can be learned about exponential functions at brainly.com/question/25537936

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2 years ago
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Answer:

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Firstly, we need to know the amount in which Z got

That will be 250,000-x-y

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So the ratio of the contribution in x:y:z will be;

60,000:110,000:80,000

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3 years ago
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Hope this helps : )

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ANSWER= 14 oz bottle

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28 is triple the price when it’s only two times bigger
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