An object is moving in the plane according to these parametric equations: x(t) = πt + cos(4πt + π/2) y(t) = sin(4πt + π/2) a portion of the "cycloidal" path (on the time interval [0,1]) is shown in this figure:.

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.

What is another way name for bd? cf, bd, cf, be

Ineed so much with both of these tot