Question 19
Every 5 minutes, the algae covering a pond doubles in area. Within 1 hour, the whole surface is covered. How long would it take to cover the pond if we started with twice as much algae? Give the time in minutes.
Interpret “within 1 hour” as becoming completely covered at exactly 60 minutes, as intended by the source key; each doubling occurs after 5 minutes.
Interpret “within 1 hour” as becoming completely covered at exactly 60 minutes, as intended by the source key; each doubling occurs after 5 minutes.