A ball at rest falls from a platform above the ground. The ball falls freely and hits the ground 3 s later. How fast is it falling right before it
lands?

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

i think if it were me i whould divide 300 dide 15

step-by-step explanation:

i think the answer is a, hope this : )