Let X be a random sample representing the score of a student in the American Chemical Society Examination.
P(450 < x < 500) = P((450 - 500)/(90/sqrt(25)) < z < (500 - 500)/(90/sqrt(25))) = P(-2.778 < z < 0) = P(z < 0) - P(z < -2.778) = P(z < 0) - [1 - P(z < 2.778)] = P(z < 0) + P(z < 2.778) - 1 = 0.5 + 0.99727 - 1 = 0.49727 = 49.7%
Step-by-step explanation:
One hundred minus five n
The pick up fee is $2.50.
After each mile, $1.95 is added.
That is, after the first mile, we have;

Isaac total charge = $27.46;
Generally, let the number of miles driven by the taxi be x, then we have;

Solving for the number of miles Isaac travelled, we have;

CORRECT OPTION:
252 dollars. (First you find how much is being added each week, it’s 24 dollars, then you multiply it by 18, and get 252.)