PLEASE HELP PLEASE URGENT!! Find the number of unique permutations of the letters in each word.

BALLOON
A) 630
B)1,260
C) 1,870
D) 315

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)

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Answer asap evaluate 4-0.25g+0.5h4−0.25g+0.5h when g=10g=10 and h=5h=5.