Consider the polynomials given below. P = x^4 + 3x^3 + 2x^2 - x + 2
Q = (x^3 + 2x^2 + 3) (x^2 - 2)

Determine the operation that results in the simplified expression below.

x^5 + x^4 - 5x^3 - 3x^2 + x - 8

A. PQ
B. Q - P
C. P + Q
D. P - Q

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.