What does the author mean by “ symbol “.?

it really depends because they could be doing quotations around like a paragraph. so it depends on what you're asking because if you're asking for the definition then it means a Mark or character by used as a conventional representation of an object function or process it stated in the dictionary if you want to double-check.

for this case, we must find the number of deaths per day of the year 2015, in automobile accidents, knowing that 32,400 people died.

knowing that the year 2015 had 365 days we have the following division:

where "x" represents the number of deaths per day.

rounding off we have:

approximately, 89 people per day died in 2015

answer:

89 people per day

answer: provide the speech

explanation: