Solve the problem.The table shows the number of dollars spent in Country X (in millions) on environmental protection programs during the years 
through 
. Use least-squares regression to find the polynomial function that best models these data. Round coefficients to three decimal places. 
A. f(x) ? 0.005x3 - 0.102x2 + 0.805x + 4.697
B. f(x) ? -0.010x2 + 0.446x + 5.759
C. f(x) ? 0.007x3 - 0.105x2 + 0.805x + 4.397
D. f(x) ? -0.010x2 + 0.346x + 5.253
Answer: A
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Add or subtract as indicated and write the result in standard form.(-7 + 7i) - 8
A. 15 - 7i B. 1 - 7i C. 1 + 7i D. -15 + 7i
Solve.Tiffany bought a video for $11.50. If she paid with two $10 bills, what was her change?
A. $9.00 B. $9.5 C. $8.5 D. $8.4
Solve.The area of a triangle is given byA = 
ab sin C,where a and b are the lengths of two of the sides and C is the included angle. If 
and C is an acute angle, what must C be? Give your answer in degrees to the nearest hundredth.
A. 135.57° B. 44.43° C. 22.21° D. No such triangle exists.
Use vertices and asymptotes to graph the hyperbola. Find the equations of the asymptotes.y = ± 
A. Asymptotes: y = ± x
B. Asymptotes: y = ± 2x
C. Asymptotes: y = ± x
D. Asymptotes: y = ± 
x