Diketahui:&nbsp;<img align="middle" alt="begin mathsize 14px style HVL equals 7 comma 20 space cm end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mi»HVL«/mi»«mo»=«/mo»«mn»7«/mn»«mo»,«/mo»«mn»20«/mn»«mo»§#160;«/mo»«mi»cm«/mi»«/mrow»«/mstyle»«/math»" height="12" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -2px;" width="97" />&nbsp;

Ditanyakan: koefisien pelemahan? 
Jawab:

<img align="middle" alt="begin mathsize 14px style H V L equals fraction numerator 0 comma 693 over denominator mu end fraction
mu equals fraction numerator 0 comma 693 over denominator H V L end fraction
mu equals fraction numerator 0 comma 693 over denominator 7 comma 20 end fraction
mu equals 0 comma 096 space cm to the power of negative 1 end exponent end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mi»H«/mi»«mi»V«/mi»«mi»L«/mi»«mo»=«/mo»«mfrac»«mrow»«mn»0«/mn»«mo»,«/mo»«mn»693«/mn»«/mrow»«mi»§#956;«/mi»«/mfrac»«mspace linebreak=¨newline¨/»«mi»§#956;«/mi»«mo»=«/mo»«mfrac»«mrow»«mn»0«/mn»«mo»,«/mo»«mn»693«/mn»«/mrow»«mrow»«mi»H«/mi»«mi»V«/mi»«mi»L«/mi»«/mrow»«/mfrac»«mspace linebreak=¨newline¨/»«mi»§#956;«/mi»«mo»=«/mo»«mfrac»«mrow»«mn»0«/mn»«mo»,«/mo»«mn»693«/mn»«/mrow»«mrow»«mn»7«/mn»«mo»,«/mo»«mn»20«/mn»«/mrow»«/mfrac»«mspace linebreak=¨newline¨/»«mi»§#956;«/mi»«mo»=«/mo»«mn»0«/mn»«mo»,«/mo»«mn»096«/mn»«mo»§#160;«/mo»«msup»«mi»cm«/mi»«mrow»«mo»-«/mo»«mn»1«/mn»«/mrow»«/msup»«/mrow»«/mstyle»«/math»" height="135" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -70px;" width="104" />&nbsp;

Jadi, besar koefisien pemulihan bahan tersebut adalah&nbsp;<img align="middle" alt="begin mathsize 14px style bold 0 bold comma bold 096 bold space bold cm to the power of bold minus bold 1 end exponent end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mn mathvariant=¨bold¨»0«/mn»«mo mathvariant=¨bold¨»,«/mo»«mn mathvariant=¨bold¨»096«/mn»«mo mathvariant=¨bold¨»§#160;«/mo»«msup»«mi mathvariant=¨bold¨»cm«/mi»«mrow»«mo mathvariant=¨bold¨»-«/mo»«mn mathvariant=¨bold¨»1«/mn»«/mrow»«/msup»«/mstyle»«/math»" height="17" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -3px;" width="83" />.

Hitung koefisien pelemahan suatu bahan yang terkena suatu radiasi apabila mempunyai HVL 7,20&nbsp;cm!<img align="middle" alt="undefined" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mo»§#160;«/mo»«/math»" height="5" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAAFCAYAAABirU3bAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAEx0lWhwAAAAxJREFUeNpjYKABAAAAVQAB8vOvGAAAAE50RVh0TWF0aE1MADxtYXRoIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8xOTk4L01hdGgvTWF0aE1MIj48bW8+JiN4QTA7PC9tbz48L21hdGg+SHplFQAAAABJRU5ErkJggg==" style="max-width: none; vertical-align: -1px;" width="4" />&nbsp;

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