Answer:
448 subscribers use more than 15 hours per week
Step-by-step explanation:
In this question, we shall be using the proportion of what was gotten from a survey to estimate the number of subscribers that use more than 15 hours per week
From the question, we can see that out of the 50 people surveyed, 28 use more than 15-hours per week based on data
The proportion that thus use 15-hours per week based on data is 28/50
Now to know the number of subscribers out of 800 that use more than 15-hours per week based on data we have ; 28/50 * 800 = 28 * 16 = 448 subscribers