A class at school had 21 students. When Thanksgiving break came around, there were 24 students in the class. What is the percent increase in the size of the class?

y/x of point b= y/x of point a

step-by-step explanation:

(i got the same question, this was the correct answer.)

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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