A. $24.28
B. $30.35
C. $20.23
D. $16.19

What is (28 + 7 + 6 + 3) x 1/2 show your work

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

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.