Update text_block.md

Author: ashwinpn

text_block.md

@@ -10,7 +10,7 @@ In their early stages, outbreaks display *exponential growth*: the number of cas
 
 For a deeper explanation of how exponential growth relates to epidemics, see [this video](https://www.youtube.com/watch?v=Kas0tIxDvrg).
 
-One way to understand how smaller increments can lead to drastic changes in terms of exponentiation, is to consider the difference in values between 1^1000 and (1.01)^1000. 1^1000 is still 1, but (1.01)^100 is ~ 20,960! This is why social distancing is such a crucial measure of prevention against the spread of COVID-19. For more inisghts, see [reproduction number](https://en.wikipedia.org/wiki/Basic_reproduction_number).
+One way to understand how smaller increments can lead to drastic changes in terms of exponentiation, is to consider the difference in values between 1<sup>1000</sup> and (1.01)<sup>1000</sup>. 1<sup>1000</sup> is still 1, but (1.01)<sup>1000</sup> is ~ 20,960! This is why social distancing is such a crucial measure of prevention against the spread of COVID-19. For more inisghts, see [reproduction number](https://en.wikipedia.org/wiki/Basic_reproduction_number).
 
 ### The growth rate is not only a property of the virus