PLEASE ANSWER ALL I WILL MARK AS BRAINLIEST

Answer:
Q10. 21 doses; Q 11. 21 doses; Q12. 42 bottles
Step-by-step explanation:
Question 10
(a) Calculate the total ounces
[tex]\text{Total ounces} = \text{7 da} \times \dfrac{\text{3 times}}{\text{1 da}} = \dfrac{\frac{1}{2}\text{ oz}}{\text{1 time}}= \text{10.5 oz}[/tex]
(b) Calculate the number of doses
[tex]\text{Number of doses} = \text{10.5 oz } \times \dfrac{\text{1 dose}}{\frac{1}{2}\text{ oz}} = \textbf{21 doses}[/tex]
Question 11
[tex]\text{Number of doses} = \text{7 da} \times \dfrac{\text{3 doses}}{\text{1 da}} = \textbf{21 doses}[/tex]
Question 12
(a) Convert ounces to litres
[tex]\text{Volume} = \text{2 oz} \times \dfrac{\text{29.57 mL}}{\text{1 oz}} \times \dfrac{\text{1 L}}{\text{1000 mL}} = \text{0.05914 L}[/tex]
(b) Calculate the number of bottles
[tex]\text{No of bottles} = \text{2.5 L} \times \dfrac{\text{1 bottle}}{\text{0.059 14 L}} = \textbf{42 bottles}[/tex]