manishtank1988 wrote:

A company sells seed either by the pound or by the acreage planted. It will sell seed M for no less than $5.50 a pound or for no less than $12.75 per acre planted. Farmers will pay no more than $6.25 a pound and no more than $13.50 per acre planted and always choose the price structure that results in the lowest cost per acre. If it takes 2 pounds of seed M to plant an acre of loamy soil and 3 pounds to plant an acre of clay soil, what is the range in dollars per pound, x, within which sales of seed M could take place?

(A) $4.25 ≤x ≤ $5.50

(B) $4.25 ≤x ≤ $6.25

(C) $4.50 ≤x ≤ $6.25

(D) $5.50 ≤x ≤ $6.75

(E) $5.50 ≤x ≤ $13.50

Hi..

We have to find the lowest and max for the range..

Company -

5.5 per pound or 12.75 per acre

But 3 pounds are required for claysoil per acre, so price per pound if someone pays by acre =12.75/3=4.25

So lowest is 4.25

Farmer

6.25 pound or 13.50 if paid per acre..

Since we are looking for higher range, say he buys 2 pounds for loamy soil.

13.50/2=6.75 BUT he will always choose what costs the least per acre, so buying 2 pounds at 6.25= 2*6.25=12.50 will be cheaper than buying per acre.

13.5 for 3 pounds will ofcourse be <6.25

So higher range will remain 6.25 only

So lowest when company sells per acre for claysoil =4.25

Highest when farmer buys per pound for loamy soil = 6.25

So range should be $4.25 ≤x ≤ $6.25

B

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