At lawson middle school, mr. hernandez asked 90 randomly selected students from each grade level for their favorite subject, and 28 chose social studies as their favorite. he used this data to draw the inference that out of the 250 middle school students, about 20% prefer social studies. did he make a reasonable inference? yes, mr. hernandez’s sample is random, not biased, large enough compared to the population, and 28 is 20% of 250. yes, mr. hernandez’s sample is random, not biased, large enough compared to the population, and 28 is 20% of 90. no, mr. hernandez’s sample is random, not biased, large enough compared to the population, but 28 is not 20% of 90. no, mr. hernandez’s sample is not large enough compared to the population.

No, Mr. Hernandez’s sample is random, not biased, large enough compared to the population, but 28 is not 20% of 90.

Step-by-step explanation:

At Lawson Middle School, Mr. Hernandez asked 90 randomly selected students from each grade level for their favorite subject.

so, the percent of students who love social studies is given by:

No, Mr. Hernandez’s sample is random, not biased, large enough compared to the population, but 28 is not 20% of 90.

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step-by-step explanation:

d = distance between moon and sun, which in this problem is the hypotenuse of a right triangle.  

the distance y is the side opposite to angle x in the right triangle.   use the definition of the sine function from basic trigonometry.

sin(x) = y/d ⇒

d = y/sin(x)

the correct answer to your question is a. 4^4

good luck my friend!

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