GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
The population of a bacteria culture doubles every 2 minutes
[#permalink]
01 Jul 2020, 10:00
01 Jul 2020, 10:00
Expert Reply
00:00
Question Stats:
62% (01:30) correct
37% (01:23) wrong based on 32 sessions
Hide Show timer Statistics
The population of a bacteria culture doubles every 2 minutes. Approximately how many minutes will it take for the population to grow from 1,000 to 500,000 bacteria?
(A) 10
(B) 12
(C) 14
(D) 16
(E) 18
(A) 10
(B) 12
(C) 14
(D) 16
(E) 18
Re: The population of a bacteria culture doubles every 2 minutes
[#permalink]
01 Jul 2020, 10:00
01 Jul 2020, 10:00
Expert Reply
Post A Detailed Correct Solution For The Above Questions And Get A Kudos.
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: The population of a bacteria culture doubles every 2 minutes
[#permalink]
01 Jul 2020, 10:30
01 Jul 2020, 10:30
1
Carcass wrote:
The population of a bacteria culture doubles every 2 minutes. Approximately how many minutes will it take for the population to grow from 1,000 to 500,000 bacteria?
(A) 10
(B) 12
(C) 14
(D) 16
(E) 18
(A) 10
(B) 12
(C) 14
(D) 16
(E) 18
When we scan the answer choices (ALWAYS scan the answer choices BEFORE deciding on the approach you'll take), we see that the number of population "doublings" will be between 5 and 9.
Given these relatively small values, we might solve this question by creating a growth table
MINUTES ELAPSED | POPULATION
0 | 1,000
2 | 2,000
4 | 4,000
6 | 8,000
8 | 16,000
10 | 32,000
12 | 64,000
14 | 128,000
16 | 256,000
18 | 512,000 DONE!!
Answer: E
Cheers,
Brent
