Emily sets up a lemonade stand from her past experience from selling lemonade she knows that 11 out of every 33 people that walk by the stand will buy a cup of lemonade. what is the probability that the next person to walk by the stand is a girl and that this girl will buy a cup of lemonade?

there is a 33.1/3 percent chance

Step-by-step explanation:

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.