Are these two polygons similar? If so write the scale factor and similarity statement. If not explain why not

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

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0