If you were born n February, 29th, 2000, how old are you in 2020? Will give brainiest to best AND right answer. For extra points, if that's even possible, here's a riddle: I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I? NO GOOGLING.

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

A6,600 kg train car moving at +2.0 m/s bumps into and locks together with one of mass 5,400kg moving at -3.0m/s. what is their final velocity? +0.50 m/s -1.0 m/s +2.5 m/s -0.25 m/s

Asher cycles 12 miles in 16 hours. what is his speed?