I need help I don't know what to do

Step-by-step explanation:

so you understand what to do, or what they want you to figure out.

AD  is an "arc length" .  So they want to know the length, in degrees. along the circle , from A to D.   Why didn't they just say so, huh.  :D   well, they kinda did, but not as clear as they could have.

next.  you need to know how far around a circle is all the way around?  

if you guessed 360°,  you are right

next because they gave us that angle of 93° we know all the angles around the point E,  complimentary angles add to 180 so 180-93 = 87°.  That's the to the left of 93 and directly below it too.  This is the answer to the 2nd question  ∠DEC= 87°

we can only write arc length of AD in respect to what we know about the circle.

so,   arc length of AD is  161° + BA + AD + DC = 360

or getting AD by it self , then

AD =360 -161 -BA -DC

AD = 199°-BA-DC

maybe that's all you need to do,  also i'm wondering if there is some more info about this problem , maybe at the top of the page?  of off the screen?

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:

chiken

step-by-step explanation: