What is the answer to x³+y³+z³=k

What is the value of the expression below? (81^2)^1/8

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?