The fraction of a lake’s surface covered by algae was initially 0.48 and
was halved (cut in half) each year since the passage of anti-pollution laws. How long
after the passage of anti-pollution laws was only 0.03 of the lake’s surface covered
with algae?

Question

The fraction of a lake’s surface covered by algae was initially 0.48 and
was halved (cut in half) each year since the passage of anti-pollution laws. How long
after the passage of anti-pollution laws was only 0.03 of the lake’s surface covered
with algae?

anonymous · Answer

involves logs! not sure how to go about it though..