Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

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

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

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

Offline

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

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

Offline

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

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

Offline

Pages: **1**