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:
The lateral surface area of a prism is the sum of the areas of its lateral faces. The total surface area of a prism is the sum of the areas of its lateral faces and its two bases.
Answer:
-13/3
Step-by-step explanation:
Let f(x)=A
x=f'(A)
x=3(A+5)
A=(x-15)/3
f(x)=(x-15)/3
ff(2)=(2-15)/3
=-13/3
Answer:
12/1
Step-by-step explanation:
Answer:
-24
Step-by-step explanation: