14. A restaurant prepares \( 4,35 \mathrm{~kg} \) of dough per batch. How much dough is prepared in 18,9 batches? 15. A mobile phone weighs \( 0,275 \mathrm{~kg} \). What is the total weight of 26,5 such phones?

Let's solve each problem step by step. --- ### **Problem 14** **A restaurant prepares \( 4.35 \) kg of dough per batch. How much dough is prepared in \( 18.9 \) batches?** **Solution:** To find the total amount of dough prepared, multiply the amount of dough per batch by the number of batches: \[ \text{Total Dough} = 4.35 \, \text{kg/batch} \times 18.9 \, \text{batches} \] \[ \text{Total Dough} = 82.215 \, \text{kg} \] **Answer:** The restaurant prepares **82.215 kg** of dough in 18.9 batches. --- ### **Problem 15** **A mobile phone weighs \( 0.275 \) kg. What is the total weight of \( 26.5 \) such phones?** **Solution:** To find the total weight, multiply the weight of one phone by the number of phones: \[ \text{Total Weight} = 0.275 \, \text{kg/phone} \times 26.5 \, \text{phones} \] \[ \text{Total Weight} = 7.2875 \, \text{kg} \] **Answer:** The total weight of 26.5 phones is **7.2875 kg**. ---