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Sidana [21]
3 years ago
8

A sample of iron-59 contains 50mg. One hundred days later, the sample contains 10.75 mg. What is the half-life of iron-59, in da

ys?

Mathematics
1 answer:
DiKsa [7]3 years ago
7 0

Answer:

45 days

Step-by-step explanation:

Please kindly check the attached files for details.

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The answer is  0 < x <span>≤ 7 
</span>
First, we know that width =  x
Which means that length = x +18

So, the possible equation for the Table's area is

X (X + 18)  ≤ 175

X^2 + 18x - 175  <span>≤ </span>0

Next, we need to calculate is by using complete square method
x^2 + 18x + 81 <span>≤ 175 + 81

(x + 9)^2 </span><span>≤ 256

|x + 9| </span><span>≤ sqrt(256)

|x + 9| </span><span>≤ +-16

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</span>-16 - 9 ≤ x <span>≤ 16 - 9

</span>-25 ≤ x <span>≤ 7

Since the width couldn't be negative, we can change -25 with 0,

so it become
</span> 0 < x ≤ 7 
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3 years ago
Edison, Xiu, and Amia are childhood friends who go to different high schools. They were wondering if there's
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Answer:

22.33

Step-by-step explanation:

khan

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2 years ago
What is the solution to this systems of liner equations y-x=6 y+x=-10
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The solution is the point where the two lines intersect (are equal) so y=y and we can say:

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3 years ago
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Step-by-step explanation:

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Term N = N + 2 toothpicks

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2 years ago
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