4. The height of a rocket launched upward from a 85-foot cliff is modeled by the function h(t) = -16t2 + 35t + 85, where his height in feet and t is time in seconds.
a) What is the maximum height of the rocket?
b) How long does it take for the rocket to reach the maximum height?
c) How long does it take the rocket to reach the ground at the bottom of the cliff?
In the 7ern Product Property to solve each equation.

Which of the following of the following sets of side lengths could not form a triangle?

Find the balance at the end of 4 years if 1000 is deposited at the rate of

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?