Find the area of a circle with a radius r of 6 feet. round off your answer to one decimal point. hint: the formula for the area of a circle is a = π r2 and π should be approximated to four decimal places.

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me