Answer:
It's either
143 or 6620
Explanation:
[x will represent days] [7 people were caught with the virus] [Lets use 0.15 as 15%]
So, in order to find x, you need to create an equation.
7x + 0.15 = 1000 = 142.835 or 143
or this equation
7 + 0.15x = 1000 = 6620
- I apologize for not giving an exact answer but I couldn't pick between these two. I think it would make sense to pick the first one since it gives you an actual decimal. Which in your question stated, "Round to the nearest whole day" SO, you would obviously end up with a decimal. But just in case if you have doubts on the first one, the second one is there as well. I hope this helped !