Why do we subtract $2.50 from the original?

Me asap! what is the slope of this line? enter your answer in the box.

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

How do you write something in scientific notation?