The chart shows the number of research articles in the prominent journal Physics Review that were written by researchers in Europe during 1983 - 2003 (
represents 1983).
?
?
Which of the following logistic functions best models the data? (?t is the number of years since 1983.) Try to determine the correct model without actually computing data points.
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: C
Mathematics
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Add.-3.7 + (-19.2)
A. -15.5 B. -22.9 C. 15.5 D. 22.9
Mathematics
Find a rectangular-coordinate equation for the curve by eliminating the parameter.  figure 1.png)
 figure 2.png)
Mathematics
Provide an appropriate response.Change 40° Celsius to Fahrenheit. Use the formula: F = 
C + 32
A. 82 B. 122 C. 104 D. 10 E. none of the above
Mathematics
Write the expression with positive exponents. Then simplify if possible.r-3
A. 
B. -r3
C. - 
D. r1/3
Mathematics