There are approximately 7.7 billion humans on Earth. If the virus spreads beyond the 200-person town, how long will it be until everyone on the planet is infected if the number of infected people doubles every week?

if you mean

then it's c. 8, -7/3

but if you mean

then it is

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

so then what are you asking?

step-by-step explanation: