Answer:
Step-by-step explanation:
1.A
2.C
1.C
2.A
1.B
2.21.45
3.A
I tried my best
Let x ft be the length of the base square and y ft be the height of the box.
The volume of the box is

Since the box has a volume of 15 cubic feet, then

You need to construct two squares from the metal that cost $3 per square foot.
The area of each square is
and the total cost for these two squares is 
The area of each side face is
Then the total cost for sides is 
Let S(x) be the function that represents total cost of the box, then

Find the derivative:

When
then ![12x-\dfrac{600}{x^2}=0,\\ \\12x^3=600,\\ \\x^3=50,\\ \\x=\sqrt[3]{50}\ ft.](https://tex.z-dn.net/?f=12x-%5Cdfrac%7B600%7D%7Bx%5E2%7D%3D0%2C%5C%5C%20%5C%5C12x%5E3%3D600%2C%5C%5C%20%5C%5Cx%5E3%3D50%2C%5C%5C%20%5C%5Cx%3D%5Csqrt%5B3%5D%7B50%7D%5C%20ft.)
The dimensions of the box are:
length and width - ![\sqrt[3]{50}\ ft](https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B50%7D%5C%20ft)
height - ![\dfrac{15}{\sqrt[3]{2500}}\ ft.](https://tex.z-dn.net/?f=%5Cdfrac%7B15%7D%7B%5Csqrt%5B3%5D%7B2500%7D%7D%5C%20ft.)
Answer:
4/-7
Step-by-step explanation:
14-10/2-9=
4/-7