Find the axis of symmetry of the parabola defined by the given quadratic function.f(x) = -x2 + 8x + 5
A. x = 4
B. x = 21
C. x = -4
D. x = 8
Answer: A
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Use a factor pair table to find all of the factor pairs of each number.63
A. 1 and 63; 3 and 21; 7 and 9 B. 1 and 63; 2 and 36; 3 and 21; 7 and 9 C. 3 and 63; 5 and 21; 7 and 11; 9 and 9 D. 1 and 63; 3 and 21; 5 and 11; 7 and 9
Use an identity to write the expression as a single trigonometric function or as a single number.
A. sin 9° B. cot 9° C. tan 9° D. cos 9°
For which positive integers k is the series  FIGURE 1.png)
convergent?
What will be an ideal response?
Solve the problem.In the formula A(t) = A0ekt, A is the amount of radioactive material remaining from an initial amount A0 at a given time t, and k is a negative constant determined by the nature of the material. An artifact is discovered at a certain site. If it has 59% of the carbon-14 it originally contained, what is the approximate age of the artifact? Carbon-14 decays at the rate of 0.0125% annually. Round to the nearest year, if necessary.
A. 4720 years B. 1833 years C. 3280 years D. 4221 years