If the cost is $100 plus a variable cost, the function is c(n)= 100+(2-0.01n)n. the selling price is $2.50 per unit. the revenue function is r(n)=2.50n. determine the breakeven point graphically, to the nearest whole number of units.

Breakeven point is where Cost=revenue

basically find where they are equal
graphically, find where they intersect

graph
y=100+(2-0.01n)n and
y=2.5n and see where they intersect
graph below
at about 78 units
cost=revenue=195 about

78 units

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post