How do you tell if someone actually cares about you? and just say they do?

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves