Let x represent the number. Use the given conditions to write an equation. Solve the equation and find the number.The graph shows the number of people in Country A without health insurance from year 0 through year 3. 
In year 0, there were 25 million people in Country A without health insurance. This number has increased at an average rate of 4.1 million people per year. In what year will the number of people in Country A without health insurance first reach 100 million?
A. year 21
B. year 18
C. year 19
D. year 20
Answer: C
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Find a formula for the nth term of the sequence.1, - 
, 
, - 
, 
(reciprocals of squares with alternating signs)
A. an = 
B. an = 
C. an = 
D. an = 
Use a sketch to find the exact value of y.y = cot
A. 
B. 
C. 
D. 
Divide and write the answer in simplest form.-2.7 ÷ 0.03
A. 
B. -2.67
C. -26.7
D. -90
Solve the problem.A person with no more than $7000 to invest plans to place the money in two investments, telecommunications and pharmaceuticals. The telecommunications investment is to be no more than 5 times the pharmaceuticals investment. Write a system of inequalities to describe the situation. Let 
to be invested in telecommunications and 
to be invested in pharmaceuticals.
A. x + y = 7000 x ? 5y x ? 0 y ? 0 B. x + y ? 7000 x ? 5y x ? 0 y ? 0 C. x + y = 7000 y ? 5x x ? 0 y ? 0 D. x + y ? 7000 5x ? y x ? 0 y ? 0