Solve the system by Gaussian elimination.
a. 
b. 
c. 
d. 
c.
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Solve the problem.It took 1950 J of work to stretch a spring from its natural length of 1 m to a length of 
. Find the spring's force constant.
A. 1462.5 N/m B. 487.5 N/m C. 3900 N/m D. 975 N/m
Complete the table.
A. 
B. 
C. 
D. 
Solve the equation.
= 9
A. 
B. ?
C. 
D. 
Answer the question.The graph below shows estimated world population for the period 4000 BC - 2000 AD. Note that the logarithm of the world population and not actual population is plotted on the vertical axis. This means, for example, that when the graph reaches 7 on the vertical scale, world population is 107 and when the graph reaches 9 on the vertical scale, world population is 109. Log World Population 
? -4000 -2000 0 2000Why must the graph be interpreted with care? If the graph is not interpreted with care what misleading impression might one have of world population during the period 4000 BC - 2000 AD? Why do
you think that the graph was presented in this form? What will be an ideal response?