Question 1118285
1000/s
as s approaches 0, the function approaches infinity. s=0 is a vertical asymptote. With no sunscreen, infinite sun rays, which means the model breaks down below a certain SPF.
as s approaches infinity, the function approaches 0. P=0 is a horizontal asymptote.  A large enough SPF blocks all sun rays.

1000/35=33.3% will pass through.

{{{graph(300,300,-3,50,-10,100,1000/x)}}}