Answer:
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.
90 randomly selected students from each grade level for their favorite subject, and 28 chose social studies as their favorite.
so, the percent of students who love social studies is given by:
28/90 x 100=31.11%
He used this data to draw the inference that out of the 250 middle school students, about 20% prefer social studies.
No, Mr. Hernandez’s sample is random, not biased, large enough compared to the population, but 28 is not 20% of 90.
Hello,
*I will move straight to the math. If you have questions, ask away! :)
* All calculations are in “degree mode” for a TI calculator or other calculator.
I will apply Laws of Sines/Cosines and inverse functions for your math.
Answer:
55 v 56 v70
Step-by-step explanation:
2/(√5 -√6). Multiply Numerator and Denominator by the conjugate of
(√5 - √6) that is : (√5 + √6)
2(√5 + √6) / [(√5 - √6)(√5 + √6)] = 2(√5 + √6) / (5-6) =2(√5 + √6) / (-1)
-2(√5 + √6) or -2√5 - 2√6
