The number of years N(r) since two independently evolving languages split off from a common ancestral language is approximated by N(r) = – 4000 lIn r where r is the proportion of the words from the ancestral language that are common to both languages now. a. N(0.9) = (Round to the nearest tens place.) %3D b. N(0.4) = (Round to the nearest hundreds place.) c. N(0.1) = (Round to the nearest thousands place.) d. How many years have elapsed since the split if 60% of the words of the ancestral language are common to both languages today? years have elapsed since the split. (Round to the nearest hundreds place.) e. If two languages split off from a common ancestral language about 2000 years ago, find r. r = (Round to the nearest tenth as needed.)

The number of years N(r) since two independently evolving languages split off from a common ancestral language is approximated by N(r) = – 4000 lIn r where r is the proportion of the words from the ancestral language that are common to both languages now. a. N(0.9) = (Round to the nearest tens place.) %3D b. N(0.4) = (Round to the nearest hundreds place.) c. N(0.1) = (Round to the nearest thousands place.) d. How many years have elapsed since the split if 60% of the words of the ancestral language are common to both languages today? years have elapsed since the split. (Round to the nearest hundreds place.) e. If two languages split off from a common ancestral language about 2000 years ago, find r. r = (Round to the nearest tenth as needed.)

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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The number of years N(r) since two independently evolving languages split off from a
common ancestral language is approximated by
N(r) = – 4000 lIn r
where r is the proportion of the words from the ancestral language that are common to both languages now.
a. N(0.9) =
(Round to the nearest tens place.)
%3D
b. N(0.4) =
(Round to the nearest hundreds place.)
c. N(0.1) =
(Round to the nearest thousands place.)
d. How many years have elapsed since the split if 60% of the words of the ancestral language are common to both
languages today?
years have elapsed since the split. (Round to the nearest hundreds place.)
e. If two languages split off from a common ancestral language about 2000 years ago, find r.
r =
(Round to the nearest tenth as needed.)

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