The main mast of a fishing boat is supported by a sturdy rope that extends from the top of the mast to the deck. if the mast is 20ft tall and the rope attached to the deck is 15ft away from the base of the mast, how long is the rope?

Asmall (but heavy) particle placed in a glass of water will follow a zigzag motion because the particle will bounce off of the water molecules it meets. this is called brownian motion. a physicist simulates this on a computer, by varying the distance a particle can travel (called the mean free length), on average, before it collides with a water molecule and assigning the change in motion to be one of 8 directions, each with a similar probability. by running the simulated particle (with the same mean free length) many times she determines that it should take 15 seconds, on average, for the particle to fall to the bottom, with a standard deviation of 1.5 seconds. next she lets a real particle fall through a glass of water and finds that it took 18 seconds. what does she conclude, and why?

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

Solve 2x+y=3 x+y=5 in substitution method