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For this question you need the formula for the Volume for a conical frustum which is
V= pi(H)/3(R2+Rr+r2)
where H is the height
R is the bottom radius
r is the top radius
In this question you were given all except the standing height. Since you were given the...

Pick two points on the line, like (-1,0) and (-1, 5)
m = (y2 - y1)/(x2 - x1)
m= (5 - 0) / (-1 - -1)
m= 5/0
5/0 is undefined, because you can't divide by zero. So the slope of the line is undefined, and the line is vertical.
Hope that helped, please vote if it did :)

Let Selling price be S=$12
Let Cost price be C=$5
Let Labor Cost be L=$230
Let number of pizza,n=85
Equation:
Profit = (no. of pizza x (Selling Cost- Cost Price))- Labor Cost
Profit=85x($12-$5)-$230
Profit=($85x$7)-$230
Profit = $365
You...