What is the value of the expression 6+18 ÷ 3×4
2 answers:
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Answer:
62.8 ; if you use 3.14 for pi
Step-by-step explanation:
The volume of a cylinder is v =
is 3.14, the radius is 2, and the height is 5
3.14 times 2 squared times 5 is 62.8
Answer:
24 trees per acre
Step-by-step explanation:
Let x be the optimal tree density per acre and y be the number of bushels yield per tree
Since for each unit change of x from 28 trees/acre, we have 2 unit change of y from 40 bushels per tree in the reversed direction
Change of x from 28 is x - 28
Change of y from 40 is y - 40
Therefore we have y - 40 = -2(x - 28) or y = 40 - 2(x - 28) = -2x + 96
The total bushels per acre should be y bushels/tree * x tree/acre. We want to optimize this. Substitute the above equation in for y and we have
To find the maximum value of this, we can take the first derivative and set it to 0
We know this is a maxima because . So T is maximum when x = 24 trees per acre