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Deffense [45]
3 years ago
10

How to find the value of x 103-4x=71

Mathematics
1 answer:
jasenka [17]3 years ago
3 0

Answer:

x= 8

Step-by-step explanation:

103 - 4x = 71

You have to isolate -4x by using the subtraction property of equality on 103

103(-103) -4x = 71(-103)

-4x = -32

Use Multiplication Property of Equality for the negative

4x = 32

Divide 4 from both sides

x= 8

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There are 7800 grams of lodine that have a half-life of 8 days. How much lodine will remain after 40 days?
anygoal [31]

Given that we know the initial mass of Iodine and its half-life, we want to see how much will remain after 40 days.

After 40 days, 244.17 grams of Iodine will remain.

<h3 /><h3>The half-life of materials and how to use it:</h3>

The half-life of a material is the time it takes for that amount of material to reduce to its half.

We can model the amount of Iodine as:

A(t) = A*e^{k*t}

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A(t) = 7800g*e^{k*t}

Now we use the fact that the half-life is 8 days, this means that:

e^{k*8} = 1/2

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Then the function is:

A(t) =  7800g*e^{-0.0866*t}

So now we just need to evaluate this in t = 40.

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If you want to learn more about half-life and decays, you can read:

brainly.com/question/11152793

3 0
2 years ago
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3 years ago
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mr Goodwill [35]

Answer:

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8% of something is the same thing as 8% times that. If we use that, we get the answers A and D

5 0
1 year ago
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