Which is the more reasonable temperature for a snowy day: 30° C or 30° F?

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

What is the absolute value of the complex number -4-sqrt2i

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.