Mathematics, 18.11.2019 08:31 Nov25

40% of the students in the sixth grade at andrews school participate in sports if 52 students participate in sports how many sixth graders are there at andrews school?

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Alright. This may seem tricky but it is very simple to do. Look at the problem. You know 52 students play sports, and they make up 40% of the school.

You can set up a mathematical expression then to relate what you know. You know the number of students playing sports, but you don't know how many students there are. You can set this up as 52/x, where x represents the total number of kids in the school. Next, you have your percentage. If x is everybody at the school, that means 100% of the kids right?

So you can set that up as 0.4/1 (this is the same as 40/100, but since we;re dealing with percentage you have to take it back two decimal places; 100%=1 and 40%=0.4)

Now, set the two equations against each other so you have
52/x = 0.4/1

Cross multiply to get 0.4x=52

Divide 0.4 by both sides and x = 130.

So there are 130 students.

To check your answer, put 52/130 and you will get 40%, which is correct.

Answer from: Quest

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Answer from: Quest

the results from a pre-test for students for the year 2000 and the year 2010 are illustrated in the box plot. what do these results tell us about how students performed on the 29 question pre-test for the two years?

if we compare only the lowest and highest scores between the two years, we might conclude that the students in 2010 did better than the students in 2010. this conclusion seems to follow since the lowest score of 8 in 2010 is greater in value than the lowest score of 6 in 2000. also, the highest score of 28 in 2010 is greater in value than the highest score of 27 in 2000.

but the box portion of the illustration gives us more detailed information. the middle bar in each box shows us that the median score of 20 in 2000 is greater in value than the median score of 17 in 2010. further, we note that the box and whiskers divide the illustration into four pieces. each of these four pieces represents the same portion of students. so, the upper half of the students in 2000 scored in the same score range as the upper one-fourth of the students in 2010, see the illustration at a score of 20.

by considering the upper one-fourth, upper half, and upper three-fourths instead of just the lowest and highest scores, we would conclude that the students as a whole did much better in 2000 than in 2010. we would conclude that as a whole the students in 2010 are less prepared than the students in 2000.

in this section, we discuss box-and-whisker plots and the five key values used in constructing a box-and-whisker plot. the key values are called a five-number summary, which consists of the minimum, first quartile, median, third quartile, and maximum.

step-by-step explanation: