You drop a rock down a well that is 31 m deep. How long does it take the rock to hit the bottom of the well?
O A. 6.3 5
O B. 2.7 s
O C. 1.9 s
O D. 2.5 s

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

Organelles are 1. responsible for producing power for the cell 2. tiny structures in the cell that carry out the cell's activities 3. responsible for digestion in the cell 4. found outside of the membrane

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.