Solve the problem by using a nonlinear system.In 1975, 
and 
had the same population. The population of 
continued to increase steadily, while the rate of population growth of 
(although initially less than that of 
) eventually
overtook the growth rate of City #2. The populations of two cities are modeled by the following equations: 
: 
; 
: 
, where 
corresponds to the year 1975. In what year after 1975 did the cities have the same population?
A. 1978
B. 1980
C. 1979
D. 1981
Answer: B
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Solve the problem.How many seconds after the switch in an RL circuit is closed will it take the current i to reach 
of its steady state value? Express answer in terms of R and L and round coefficient to the nearest hundredth.
A. 1.39 L/R seconds B. 0.29 L/R seconds C. 0.49 L/R seconds D. 1.59 L/R seconds
The bearing of a line segment is the acute angle that the line segment makes with a north- south line. If the bearing of PQ is N 70° E and the bearing of PR is S 32° W, what is the measure of the obtuse angle; ?QPR?
What will be an ideal response?
Convert the equation given in rectangular form into polar form.x = 3
A. r = 3
B. r = 
C. r = 
D. cos ? = 3
Graph the parabola whose equation is given. Find the x-intercepts, the y-intercept, and the vertex.y = x2 + 2x - 3
A. x-intercepts: -1 and 3;
y-intercept: 3;
vertex: (1, - 4)
B. x-intercepts: -1 and 3;
y-intercept: -3;
vertex: (1, - 4)
C. x-intercepts: -3 and 1;
y-intercept: -3;
vertex: (- 1, - 4)
D. x-intercepts: 3 and 1;
y-intercept: -3;
vertex: (- 1, - 4)