A homeowner is fencing in his triangular
backyard. Two sides of the backyard are
perpendicular to one another. One of the
perpendicular sides has the length of m feet,
and the other perpendicular side has the
length of n feet. The length of the third side of
the yard is / feet.
Which of the following functions would best model the situation above?

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

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if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads