A colony of 1000 bacteria doubles every 4 hours. How many bacteria are there after 8 hours?
Answer and explanation
Correct answer: B. 4000
- Step 1: In 8 hours there are 2 doublings.
- Step 2: 1000 x 2^2 = 4000.
Answer
4000.
Practise more Permutations, Probability and Sequences.
Free questions with an explanation for every one, and full timed Alberta Diploma Exams mock tests.
More Permutations, Probability and Sequences questions
- A fair coin is tossed 4 times. What is the probability of exactly 2 heads?
- A fair coin is tossed 5 times. What is the probability of exactly 1 head?
- The first term of an arithmetic series is 8, the common difference is 4 and there are 8 terms. What is the sum?
- A fair die is rolled 2 times. What is the probability of getting at least one six?
- What is the minimum value of f(x) = x^2 - 4x + 3?
- A colony of 200 bacteria doubles every 2 hours. How many bacteria are there after 4 hours?