Classify the triangle with angles measuring 113, 47, and 20

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

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)