We suppose that every one paid $10 for entrance. So the total paid should be $1000. Now there is $300 more. The faculty should pay $15 more than student. So the faculty number is $300/15=20. Then the number of student is 80.
A) if the diameter is 13 the radius is 6.5

b)if the diameter is 6 the radius will be 3

hope this helps
here you gooo
you can just copy this
this is the exact squared root chart
Sixteen. For the fraction 6/10 which is equivalent to 3/5