Enter the correct unit of measurement to complete the conversion. 100 liters = 1 what?

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

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)