Answer:
c , sss similatiry
Step-by-step explanation:
Answer:
For the average to be above 90, the marks in the fourth paper should be MORE THAN 92.
Step-by-step explanation:
The score of students in last 3 exams = 89 , 87 and 92
Let us assume the marks scored by the student in last exam = k
The average of marks should be above 90.
Now, 
Sum of all 4 paper's marks = 89 + 87 + 92 + k = 268 + k
Also, 90 < Average

Hence,for the average to be above 90, the marks in the fourth paper should be MORE THAN 92.
Answer:
Step-by-step explanation:
Range = maximum value - minimum value
= 25 - 6 = 19
Option D is the correct answer
38 of the bags have zips but no buttons
Acetic propionic anhydride, C5H8O3
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Ref. Pubchem
Note: next time, please post chemistry questions in appropriate section.