davidsouth444
30.10.2020 •
Mathematics
An open box is to be made from a ft by ft rectangular piece of sheet metal by cutting out squares of equal size from the four corners and bending up the sides. Find the maximum volume that the box can have.
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Ответ:
432 cm
Step-by-step explanation:
The volume of the box can be determine by using derivative function:
V = (18 - 2x) (18 - 2x) x
dV/dx = 4x^3 + 324 + 144x
equating to zero;
(x - 9) (x - 3) = 0
x = 9 , 3
putting the values in the equation;
V = (18 - 2 [3]) (18 - 2[3]) 3
volume = 432.
Ответ:
Answer is below
Step-by-step explanation:
Rewrite equations
Solve 2x+3y=−1 for x
(Add -3y to both sides)
Substitute
No solutions