Answer: 
Step-by-step explanation:
Given
The radius of the hemisphere is 
The volume of a hemisphere is given by

Insert the value

You need 270 cookies for 90 students.
Answer:
Line AB is Perpendicular to line CD
Line AB Parallel to line EF
3pm we know this because 5^3= 125 so then we plug in numbers for the exponent in this case 6 which equals 15,625 now 9am plus 6 is 3pm