Cheryl E.

asked • 03/05/14

A 12-lb puppy is gaining weight at a rate of 2/3lb per week. How much more time will it take for the puppy's weight to exceed 37 2/3lb?

A 12lb puppy is gaining weight at a rate of 2/3lb per week. How much more time will it take for the puppy;s weight to exceed 37 2/3 lb?

4 Answers By Expert Tutors

By:

Kay G. answered • 03/05/14

Tutor
4.9 (34)

~20 Years Accounting Tutoring Experience

Bethann D.

Arthur,
I agree with your work, but please stop giving the answers to students. They must work to reach their understanding in this material. Thanks!
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03/05/14

Parviz F. answered • 03/05/14

Tutor
4.8 (4)

Mathematics professor at Community Colleges

Parviz F.

This problem come up with a general concept of  Total / rate = numbers.
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03/05/14

Bethann D.

Parviz,
I think you are forgetting that the puppy starts out weighing twelve pounds and they want to know when its total weight is over the 37 2/3 pounds. They do not want to know how long it takes for the puppy to gain 37 2/3 lbs. Also, please do not list the answer for the student, but work them through it and make sure they understand how to solve the problem. Thanks!
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03/05/14

Parviz F.

Thank you Bethann:
 However ,the statement Reads : " How long it takes puppy to gain 37 2/3 lbs" , so problem deals with gain of
 37 1/2 lb , regardless the starting weight, you were correct if it said, reach 37 2/3 lb after the gain, in that case had to subtract 12 lb from 37 2/3 lb ,then divide by 2/3 lb, where Arthur has got it below.
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03/05/14

Bethann D.

The problem that I am reading states that we are trying to determine "how much time until the puppy's weight exceeds 37 2/3 lbs." I am confused as to where you are getting this information?
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03/05/14

Kay G.

Parviz, your answer is incorrect.  The problem says "exceed 37 2/3 pounds" not "gain 37 2/3 pounds."  There is definitely a difference between those two things.  While I understand that anyone can misread something, you should have re-read it again once this was pointed out to you.  The word "gain" is not in that sentence anywhere.
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03/05/14

Bethann D. answered • 03/05/14

Tutor
5.0 (156)

Mathematics, SAT, and General Tutor

Parviz F.

Hi Bethann:
  It would be nice , if made problem work algebraically, and since the rate of change is constant make a linear model for the problem, between weight and the number of weeks to gain, and proceed from that.
     W = 12 + 2/3 n
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03/05/14

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