Two bicyclists, starting at the same place, are riding toward the same campground by different routes. One cyclist rides 1200 m due east and then turns due north and travels another 1590 m before reaching the campground. The second cyclist starts out by heading due north for 1920 m and then turns and heads directly toward the campground. (a) At the turning point, how far is the second cyclist from the campground? (b) In what direction (measured relative to due east within the range (-180˚, 180˚]) must the second cyclist head during the last part of the trip?

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

c) up

hope this

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