Scientific Research In each year from 1983 to 2003 the percentage y of research articles in Physical Review written by researchers in the United States can be approximated by y = 82 − 0.78 t − 1.02 x percentage points ( 0 ≤ t ≤ 20 ) , where t is the year since 1983 and x is the percentage of articles written by researchers in Europe. 2 a. In 2003, researchers in Europe wrote 38% of the articles published by the journal that year. What percentage was written by researchers in the United States? b. In 1983, researchers in the United States wrote 61 % of the articles published that year. What percentage was written by researchers in Europe? c. What are the units of measurement of the coefficient of t ?
Scientific Research In each year from 1983 to 2003 the percentage y of research articles in Physical Review written by researchers in the United States can be approximated by y = 82 − 0.78 t − 1.02 x percentage points ( 0 ≤ t ≤ 20 ) , where t is the year since 1983 and x is the percentage of articles written by researchers in Europe. 2 a. In 2003, researchers in Europe wrote 38% of the articles published by the journal that year. What percentage was written by researchers in the United States? b. In 1983, researchers in the United States wrote 61 % of the articles published that year. What percentage was written by researchers in Europe? c. What are the units of measurement of the coefficient of t ?
Solution Summary: The author calculates the percentage written by researches in the United States, if they wrote 38% of the articles published by the journal in 2003.
Scientific Research In each year from 1983 to 2003 the percentage y of research articles in Physical Review written by researchers in the United States can be approximated by
y
=
82
−
0.78
t
−
1.02
x
percentage points
(
0
≤
t
≤
20
)
, where t is the year since 1983 and x is the percentage of articles written by researchers in Europe.2
a. In 2003, researchers in Europe wrote 38% of the articles published by the journal that year. What percentage was written by researchers in the United States?
b. In 1983, researchers in the United States wrote 61 % of the articles published that year. What percentage was written by researchers in Europe?
c. What are the units of measurement of the coefficient of t?
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