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#1 2021-12-05 03:24:21

Hannibal lecter
Member
Registered: 2016-02-11
Posts: 330

annual sea level (function of time question)

Table 1.4 shows the average annual sea level, S, in meters, in Aberdeen, Scotland,8 as a function of time, t,
measured in years before 2008

2021-12-05-181251.png

Q) In what year was the average sea level 7.019 meters?
6.957 meters?
I found in book solution this answer :  Looking at the table, we see that the average annual sea level was 7.019 fifty years before 2008, or in the year 1958.
and the average sea level was 6.957 meters 125 years before 2008, or in 1883


but how is that I see on table is 25! and 2008-25 is = 1993
the solution is it's fifty years before 2008!
is there a mistake right?


Wisdom is a tree which grows in the heart and fruits on the tongue

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#2 2021-12-05 05:39:30

Bob
Administrator
Registered: 2010-06-20
Posts: 9,358

Re: annual sea level (function of time question)

hi,

Your second answer

the average sea level was 6.957 meters 125 years before 2008, or in 1883

  is correct.

The book answer

Looking at the table, we see that the average annual sea level was 7.019 fifty years before 2008, or in the year 1958.

This is wrong.  The t value for S = 7.019 is t = 25 not 50.

Sometimes book answers are wrong.  Maybe the question was changed but not the answer. Or perhaps the answerer just got his eyes crossed.

But it's not 1993 either!  Try doing 2008 - 25 again. 

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob smile

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#3 2021-12-05 18:34:27

Hannibal lecter
Member
Registered: 2016-02-11
Posts: 330

Re: annual sea level (function of time question)

yes I mean 1983, I knew there is a mistake but wanted to make sure


Wisdom is a tree which grows in the heart and fruits on the tongue

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