Step-by-step explanation:
Given that,
The dosage of Benadryl for Dog is [tex]11\dfrac{5}{8}\ mg[/tex]
Weight of Joel's Dog is [tex]15\dfrac{1}{2}\ \text{pounds}[/tex]
(a) Benadryl dosage per pound for Joel’s dog is calculated as :
[tex]\dfrac{11\dfrac{5}{8}}{15\dfrac{1}{2}}=\dfrac{\dfrac{11\times 8+5}{8}}{\dfrac{15\times 2+1}{2}}\\\\=\dfrac{\dfrac{93}{8}}{\dfrac{31}{2}}\\\\=\dfrac{93}{8}\times \dfrac{2}{31}\\\\=0.75\ \text{dosage per pound}[/tex]
(b) If the weight of the Dog is 12 pounds, it means
[tex]\dfrac{11\dfrac{5}{8}}{12}\ \text{dosage per pounds}\\\\=\dfrac{\dfrac{93}{8}}{12}\\\\=\dfrac{93}{8}\times \dfrac{1}{12}\\\\=0.968\ \text{dosage per pounds}[/tex]
Therefore, this is the required solution.