ourse \( \mid \) Messages \( \mid \) Forums | Catendar | Gradeoook \( \mid \) tome > Math0055 Foundational Mathematics Spring \( 2025 \mathrm{M} / \mathrm{W} \) 10:00-11:50 > Assessment Check Your Learning Unit 7 Score: \( 11 / 14 \) Answered: \( 12 / 14 \) Question 9 Apollo Spas services 309 hot tubs. If each hot tub needs 135 mL of muriatic acid, how many liters of acid are needed for all of the hot tubs? Submit Question

Sure, let's work through **Question 9** step by step. **Problem Statement:** Apollo Spas services **309 hot tubs**. If each hot tub needs **135 mL** of muriatic acid, how many **liters** of acid are needed for all of the hot tubs? **Step 1: Calculate the Total Volume of Acid in Milliliters** First, find the total amount of acid needed for all 309 hot tubs by multiplying the amount needed per hot tub by the total number of hot tubs. \[ \text{Total Acid (mL)} = \text{Number of Hot Tubs} \times \text{Acid per Hot Tub} \] \[ \text{Total Acid (mL)} = 309 \times 135 \, \text{mL} \] \[ \text{Total Acid (mL)} = 41,715 \, \text{mL} \] **Step 2: Convert Milliliters to Liters** Since the question asks for the volume in liters, convert milliliters to liters. Recall that: \[ 1 \, \text{Liter} = 1,000 \, \text{Milliliters} \] \[ \text{Total Acid (Liters)} = \frac{\text{Total Acid (mL)}}{1,000} \] \[ \text{Total Acid (Liters)} = \frac{41,715 \, \text{mL}}{1,000} = 41.715 \, \text{Liters} \] **Final Answer:** Apollo Spas needs **41.715 liters** of muriatic acid to service all 309 hot tubs.