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Katarina [22]
3 years ago
5

A 42 gram sample of a substance that's used to treat thyroid disorders has a k-value of 0.124. Find the substance's half-life, i

n days. Round your answer to the nearest tenth.
Mathematics
2 answers:
enot [183]3 years ago
5 0
K = natural log (.5) / Half-Life
0.124 = .693147 / Half-Life
Half-Life = .693147 / 0.124
<span><span><span>Half-Life = 5.5898951613 days
</span> </span></span>

den301095 [7]3 years ago
4 0

Answer:

Half life of sample = 5.59 days

Step-by-step explanation:

We have the equation for half life

           t_\frac{1}{2}=\frac{ln2}{k}

Here decay constant k = 0.124

Substituting

          t_\frac{1}{2}=\frac{ln2}{0.124}=5.59\boldsymbol{\texttt{ days}}

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Circumference of a circle = 2π r (2 * π * radius) or πd (π * diameter)
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Answer:

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Step-by-step explanation:

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A circle with radius of \greenD{2\,\text{cm}}2cmstart color #1fab54, 2, start text, c, m, end text, end color #1fab54 sits insid
HACTEHA [7]

Answer:

119.43cm^2

Step-by-step explanation:

The computation of the area of the shaded region is shown below:

As we know that

= Area of the rectangle - Area of the circle

where,

Area of rectangle is

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= 132 cm^2

And, the area of the circle is

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Now the area of the shaded region is

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We simply deduct the area of the circle from the area of the rectangle so that the area of the shaded region.

7 0
3 years ago
What is the area of the circle below?<br> 10 ft
azamat

Answer:

<h3>Circle</h3>

Solve for area

A=π r^2

r =Radius

<h2>You about this first: </h2>

The circumference of a circle is its perimeter or distance around it. It is denoted by C in math formulas and has units of distance, such as millimeters (mm), centimeters (cm), meters (m), or inches (in). It is related to the radius, diameter, and pi using the following equations: C = πd. C = 2πr.

Step-by-step explanation:

Hope it is helpful....

8 0
3 years ago
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