In Thailand, the ratio bitcoin investors is gradually increased from last year. Last year, the precentage of Thai bitcoiner was 0.003%.In this year, 100000 persons are randomly selected, there are about 2500 persons, they know bitcoin. There are about 250 persons who invest in bitcoin. You are requested to test there is a significant increment in population proportion of bitcoin investor at 98% confidence level.

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

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

you'll have to attache the image of the bar graph in order for us to answer : )

step-by-step explanation:

the answer would be c