Since (78-23) is in the bracket, you need to perform the operation of minus first.
that get you with
-56x(55)÷4
and then you just do it step by step
-56x55 = -3080
-3080÷4 = -770
5/30 But you should say how many young people there are because for all we know all 30 could be young
The answer is 15000 i took the text a while ago!
V= Area of the circle at the base • height =
Pi•r^2 •h