2.8k views
0 votes
there are 16 bactiria in a beaker and four hours later there are 228 bacteria in the beaker. what is the rate of change per hour in the number of bactiria

2 Answers

4 votes

Write and solve the appropriate exponential equation:

228 = 16(r)^4, where r is the change per hour in the number of bacteria:

228

------ = r^4 = 14.25.

16

Taking the fourth root of both sides, we get: r = 1.94 (answer)

User Leo Policastro
by
8.2k points
2 votes

Initial number of bacteria = 16

Final number of bacteria after 4 hours = 228

So, bacteria increased by =
228-16=212

So per hour the bacteria increased by =
(212)/(4) = 53

Hence, the bacteria increased by 53 per hour.

User Amit Chintawar
by
9.1k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories