Problem
QUESTION 7 10 points Save Answer Use a proportion to solve the problem. A math teacher claims that the students' test scores are directly proportional to the amount of time spent studying. Amy studies 17 hours for a test and gets a score of 69 . At this rate, how many hours would she have to study to get a score of 87 ? \( 13.48 \mathrm{hr} \) \( 21.43 \mathrm{hr} \) \( 22.51 \mathrm{hr} \) \( 35 \mathrm{hr} \)
Solution
Step 1 ：\( \frac{69}{17} = \frac{87}{x} \)
Step 2 ：\( x = \frac{87 \times 17}{69} \)
Step 3 ：\( x = 21.43 \)
