Which of the following is not a characteristic of both experiments and surveys? O A. The researcher exercises direct control over at least one variable
O B. The data collected might be studied for patterns.
O C. Subjects should be randomly selected.
D. Data are collected about a population.

d) 48

step-by-step explanation:

16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,256,272,288,304,320,336

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

so, converting firstly the mixed fractions to improper fractions and then "adding".

slope is 35 and 20 miles is the y-intercept.

step-by-step explanation: