Last month, maria purchased a new cell phone for $500. the store manager told her that her new cell phone would depreciate by 70% every 6 months. maria thinks she will want to replace her phone after a while. what will be the value (v) of her phone if she tries to trade it in after 2 years? select all that apply. v = 500(0.70)4 v = 500(0.30)4 v = 500(0.30)2 v = 500(1 – 0.70)4 v = 0.70(500)4 v = 0.30(500)2

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?

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Solve 2^x=32 and rewrite this equation in a logarithmic form