Aresearcher posts a print advertisement offering $20 in exchange for participation in a short study. the researcher accepts the first five people who respond to the advertisement. which of the following statements is true about the sample?

It is not a valid sample because it is not a random sample of the population.

Step-by-step explanation:

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11-1 > 1-1+a

-12 > a

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2