
Answer:
A total of 12,500 SARS-CoV-2 viruses
Explanation:
Consider a trillion against a thousand, there exists a difference of a million, which means a nanometer will be a million times smaller as compared to one millimeter:
see below for a milli divided by nano
1/1000 ÷ 1/1000,000,000 = 1000,000,000 ÷ 1000 = 1000,000
(in reference to the hint given in the question statement)
The question puts one millimeter against 80 nanometers. The calculation for this will be given as follows:
1/1000 ÷ 80/1000,000,000 = 1000,000,000 ÷ 80,000 = 12,500
According to the above working, there are 12,500 SARS-Cov-2 viruses thatg can fit into one period.