Triangle abc is a right triangle and cos(22.6)=b/13. slobs for b and round to the nearest whole number

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Determine the common ratio and find the next three terms of the geometric sequence. 10, 2, 0.4, a. 0.2; -0.4, -2, -10 c. 0.02; 0.08, 0.016, 0.0032 b. 0.02; -0.4, -2, -10 d. 0.2; 0.08, 0.016, 0.0032 select the best answer from the choices provided a b c d

Marking brainliest for original answer.. are these two triangles similar? how can you tell?