If the area of sector AOC is 12π cm² and the measure of the radius is 6 cm, what is the measure of the central angle in radians? Multiple Choice Options:
a. 3π/4
b. 5π/6
c. 2π/3
d. 4π/3

Astudent is solving a system of equations by substitution and comes up with the solution 3 = 3. assuming that he solved the problem correctly, which of the following can be said about this system of equations?

Find two numbers if their ratio is 4: 7 and their difference is 123.

Simplify. (-3ab^3)^4 a. -7ab^12 b. -12a^4b^7 c. -81a^4b^7 d. 81a^4b^12