Last semester you took 3 final exams and you want to figure out which exam score really is your best score. here are the scores from your classes. which of your three exam scores is the worst when compared to the other students in your classes? math: your score = 78, class mean = 82, standard deviation = 5 history: your score = 85, class mean = 87, standard deviation = 4 english: your score = 80, class mean = 76, standard deviation = 2.5.

option: d is correct

step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

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