GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 09 Dec 2019, 18:40

Close

GMAT 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

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

If the elevation above water level of a breaching whale is given by th

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 59622
If the elevation above water level of a breaching whale is given by th  [#permalink]

Show Tags

New post 09 Feb 2017, 03:15
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

56% (02:05) correct 44% (02:04) wrong based on 126 sessions

HideShow timer Statistics

Manager
Manager
User avatar
B
Joined: 29 Feb 2016
Posts: 113
Location: India
GMAT 1: 700 Q49 V35
GPA: 3
GMAT ToolKit User
Re: If the elevation above water level of a breaching whale is given by th  [#permalink]

Show Tags

New post 09 Feb 2017, 03:28
Bunuel wrote:
If the elevation above water level of a breaching wale is given by the expression −t^2 + 12t − 35 where t is the time, in seconds, after an observer begins watching, is the whale presently underwater?

(1) t < 8.

(2) t > 5.



E

when t = 6 value is 1, 7 then value is 0 and 8 then value is -3. I am not sure though
_________________
Find what you love and let it kill you. — Charles Bukowski
Senior SC Moderator
User avatar
V
Joined: 14 Nov 2016
Posts: 1347
Location: Malaysia
GMAT ToolKit User
Re: If the elevation above water level of a breaching whale is given by th  [#permalink]

Show Tags

New post 16 Feb 2017, 00:47
Bunuel wrote:
If the elevation above water level of a breaching wale is given by the expression \(−t^2 + 12t − 35\) where t is the time, in seconds, after an observer begins watching, is the whale presently underwater?

(1) \(t < 8\).

(2) \(t > 5\).


Official solution from Veritas Prep.
Attachments

Untitled.jpg
Untitled.jpg [ 90.17 KiB | Viewed 1845 times ]


_________________
"Be challenged at EVERY MOMENT."

“Strength doesn’t come from what you can do. It comes from overcoming the things you once thought you couldn’t.”

"Each stage of the journey is crucial to attaining new heights of knowledge."

Rules for posting in verbal forum | Please DO NOT post short answer in your post!

Advanced Search : https://gmatclub.com/forum/advanced-search/
Veritas Prep GMAT Instructor
User avatar
V
Joined: 16 Oct 2010
Posts: 9859
Location: Pune, India
Re: If the elevation above water level of a breaching whale is given by th  [#permalink]

Show Tags

New post 16 Feb 2017, 09:41
1
1
Bunuel wrote:
If the elevation above water level of a breaching wale is given by the expression −t^2 + 12t − 35 where t is the time, in seconds, after an observer begins watching, is the whale presently underwater?

(1) t < 8.

(2) t > 5.


A breaching whale is a whale leaping out of the water.

Elevation = −t^2 + 12t − 35

(1) t < 8
Let's notice what happens at exactly t = 8
Elevation = -(8)^2 + 12*8 - 35 = -3
It means the whale is under water at this time.

Put t = 7
Elevation = -(7)^2 + 12*7 - 35 = 0
So the whale is exactly at the surface at this time.

Put t = 6
Elevation = -(6)^2 + 12*6 - 35 = 1
The whale has a positive elevation at this time.

Let's find out what happens at t = 5
Elevation = -(5)^2 + 12*5 - 35 = 0
So the whale is exactly at the surface at this time.

We see what is happening here. The whale is exactly at the surface at t = 5, is out of water and then back in the water at t = 7.

Given that t < 8, the whale is underwater if t > 7 or t < 5. Not sufficient.

(2) t > 5
If t = 6, the whale is out of water but if t > 7, it is underwater. Not sufficient.

Using both, If t = 6, the whale is out of water but if t > 7, the whale is underwater. Not sufficient.

Answer (E)
_________________
Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 13730
Re: If the elevation above water level of a breaching whale is given by th  [#permalink]

Show Tags

New post 24 Nov 2019, 00:53
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Club Bot
Re: If the elevation above water level of a breaching whale is given by th   [#permalink] 24 Nov 2019, 00:53
Display posts from previous: Sort by

If the elevation above water level of a breaching whale is given by th

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne