A few days ago
Math Question?
The number of bacteria on a Petri dish presently 256 000. The formula for its rate of growth is B(t) = Bnow(2^1/d) , where d , the doubling time is 45 minutes. How many bacteria were on the dish 1 hour and 30 minutes ago?
Top 4 Answers
A few days ago
Favorite Answer
each 45 minutes B will times 2
therefore 1 hour 30 minutes B will times 4
B = (25600/2)/2
= 12800/2
= 6400.
0
A few days ago
Set out what you know:
Bnow – 256000
d – 45
t – -90 (60+30=1 hour and 30 min)
———————————————-
Fill it in:
-90=25600(2^1/45)
———————————————-
Rearrange:
Bacteria 1.5hrs ago = 25600(2^1/45)+90
———————————————-
Answer:
256091.0155
———————————————-
Reasoning:
There should be more bacteria at Bnow than 1.5hrs ago. Therefore, I think that your equation is not quite right. Maybe check it, or ask the teacher if there is something else to the calculation. Good luck 🙂 Hope this helps 🙂
0
A few days ago
if u can tell me what ^ means and / I can help
Is / divide
0
A few days ago
512000
0
- Academic Writing
- Accounting
- Anthropology
- Article
- Blog
- Business
- Career
- Case Study
- Critical Thinking
- Culture
- Dissertation
- Education
- Education Questions
- Essay Tips
- Essay Writing
- Finance
- Free Essay Samples
- Free Essay Templates
- Free Essay Topics
- Health
- History
- Human Resources
- Law
- Literature
- Management
- Marketing
- Nursing
- other
- Politics
- Problem Solving
- Psychology
- Report
- Research Paper
- Review Writing
- Social Issues
- Speech Writing
- Term Paper
- Thesis Writing
- Writing Styles