Question

select the correct answer. bacteria begins to grow on the waters surface in a non - operational swimming pool on september 20. the bacteria grows and covers the water in such a way that the area covered with bacteria doubles every day. if it continues to grow in this way, the waters surface will be entirely covered with bacteria on september 28. when will a quarter of the waters surface be covered? a. the waters surface will be covered a quarter of the way on september 27. b. the waters surface will be covered a quarter of the way on september 26. c. the waters surface will be covered a quarter of the way on september 24. d. the waters surface will be covered a quarter of the way on september 25.

Explanation:

Step1: Understand the growth pattern

The area of bacteria doubles daily.

Step2: Work backwards from full - coverage

If the pool is fully covered on September 28, then on September 27 it was half - covered (since the area doubles each day).

Step3: Find when it's a quarter - covered

If it's half - covered on September 27, then on September 26 it was a quarter - covered (because the area doubles from September 26 to September 27).

Answer:

B. The water's surface will be covered a quarter of the way on September 26.