Which explains whether or not Sahira's sample is representative? No, it is not representative because literature books were chosen much more often than the other types. Yes, it is representative because each type of book was chosen a unique number of times. Yes, it is representative because each type of book was represented in the approximate proportion that exists in the library. Yes, it is representative because each type of book was selected as part of the sample.

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

17

step-by-step explanation:

51/3=17

thus 17 is your answer.