Eric has a medium-term goal of funding one year of community college after he graduates from high school in two years. Each class costs $125 per credit hour. Eric plans to take 15 credit
hours per semester for a total of 30 credit hours per year. How much money does he need to
save per month to reach his goal in two years?

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

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?

An angle that measures between 90 and 180° is called a(,