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.
What is the approximate ratio of energy used from oil in 197
[#permalink]
30 Jan 2019, 05:38
30 Jan 2019, 05:38
00:00
Question Stats:
100% (02:06) correct
0% (00:00) wrong based on 6 sessions
Hide Show timer Statistics
Attachment:
Capture.JPG [ 25.26 KiB | Viewed 2607 times ]
What is the approximate ratio of energy used from oil in 1979 to energy used from oil in 2004 ?
a) \(\frac{55}{1}\)
b) \(\frac{35}{1}\)
c) \(\frac{11}{7}\)
d) \(\frac{25}{18}\)
e) \(\frac{9}{10}\)
If anyone can help with this question please. Its simple, but the book used (20,623) for 2004 calculations. I cant understand from where this number is.
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: What is the approximate ratio of energy used from oil in 197
[#permalink]
13 Mar 2019, 10:04
13 Mar 2019, 10:04
1
SKH121 wrote:
Attachment:
Capture.JPG
What is the approximate ratio of energy used from oil in 1979 to energy used from oil in 2004 ?
a) \(\frac{55}{1}\)
b) \(\frac{35}{1}\)
c) \(\frac{11}{7}\)
d) \(\frac{25}{18}\)
e) \(\frac{9}{10}\)
Here's a slightly better graphic:
Notice that, in 1979, oil accounted for approximately 27% of the energy used.
Also notice that, in 1979, the TOTAL energy used = 18,509
So, the amount of energy used from oil in 1979 ≈ 27% of 18,509
≈ (0.27)(18,509)
≈ 5000
In 2004, oil accounted for approximately 18% of the energy used.
Also notice that, in 2004, the TOTAL energy used = 5090
So, the amount of energy used from oil in 1979 ≈ 18% of 5090
≈ (0.18)(5090)
≈ 900
What is the approximate ratio of energy used from oil in 1979 to energy used from oil in 2004 ?
Ratio = 5000/900
= 50/9
Hmmm, the correct answer is not among the answer choices...
Anyone??!!
Cheers,
Brent
Moderators:
