Division phrases:
-divided by
-percent of
-ratio of <span />
I think u multiply and then divide by one of its multiples
Sum = 20(1-(1/4)^5) / (1-1/4) = 26.64
The vertex (5,39)
5 is the value of x. 39 is the value of y. y is the cost function of the minimum value in dollars.
(5,39) vertex means that <span>Buying five of each type of plant costs $39, which is the lowest possible cost.</span>