In the movie Superman II a boy falls from Niagara Falls and Superman changes into his cape and outfit and flies over to save the boy. How much time did Superman have to do all this before the child would have been impaled on the sharp rocks below if the height of the Falls are 176 feet? Use h = -16t2 + vt + s where v = 0, and s = 176 and round answer to nearest tenth of a second.

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

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?

The anwser cause i do not understand just plez