Answer:
Step-by-step explanation:
If John tells 2 people and those 2 people tell 2 people, etc. the number of people is being doubled each day from the number of people the day before. This is exponential. 1 person started the whole thing. The growth rate is 2:
[tex]y=1(2)^x[/tex] where x is the number of days. Replace x with 10:
[tex]y=(2)^{10[/tex]
y = 1024 people know after 10 days