Identify the given number as "Rational", "Irrational", or "Not a real number". If the number is rational, give its exact value. If the number is irrational, give a decimal approximation to the nearest thousandth.
A. Irrational, -9.000
B. Irrational, -40.500
C. Rational, -9
D. Not a real number
Answer: D
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Find the standard-form equation for an ellipse which satisfies the given conditions.An ellipse centered at the origin having focus (
, 0) and directrix x = 
A. x2 + 
= 1
B. 
+ 
= 1
C. 
+ y2 = 1
D. 
+ y2 = 1
Provide an appropriate response. Identify the equation as pure quadratic, incomplete quadratic, complete quadratic, or not quadratic: x2 + 4x - 7 = 0.
A. Incomplete quadratic B. Complete quadratic C. Pure quadratic D. Not quadratic
Solve the problem.The table lists the amount of emissions of a certain pollutant in millions of tons.
If the amount of emissions is modeled by a function of the form 
where x is the year, estimate the year in which the amount of emissions will be 
tons.
A. 2090 B. 2020 C. 2075 D. 2050
Graph the polynomial function. Use synthetic division and the remainder theorem to find the zeros.f(x) = x3 + 4x2 - 3x - 18
A. 3 (multiplicity 2), 2;
B. -2 (multiplicity 2), 2;
C. -3 (multiplicity 2), 2;
D. -3, 3, 2;