Final answer:
To find Sarah's total weekly reading time goal, we use the information that 18% of her goal is 72 minutes. Setting up a simple proportion, we find that her total goal is 400 minutes.
Step-by-step explanation:
The student's question asks to determine Sarah's total weekly reading time goal based on the information that she has completed 18% of it by reading for 72 minutes. To find the total goal, we need to set up a proportion where 18% of the total goal equals 72 minutes.
Step-by-Step Solution:
- Express 18% as a decimal: 18% = 0.18.
- Let the total weekly reading time goal be 'T'.
- Set up the equation: 0.18 × T = 72.
- Divide both sides of the equation by 0.18 to solve for T: T = 72 / 0.18.
- Calculate the total goal: T = 400 minutes.
Therefore, Sarah's total weekly reading time goal is 400 minutes.