Answer:
8 ft is correct
Step-by-step explanation:
Answer:
The minimum value of objective function is 5 at x=0 and y=5.
Step-by-step explanation:
The given linear programming problem is
Minimize 
Subject to constraints
.... (1)
.... (2)

The related line of both inequalities are solid lines because the sign of inequalities are ≤ and ≥. It means the points lie on related line are included in the solution set.
Check both inequalities by (0,0).


This statement is not true. So, the shaded region of inequality (1) will not contain the origin.


This statement is true. It means the shaded region of inequality (2) will contain the origin.
means first quadrant.
The common shaded region is feasible region. The vertices of feasible region are (0,5), (0,12) and (7,1.5).
Calculate the value of objective function at these vertices.
For (0,5)

For (0,12)

For (7,1.5)

Therefore the minimum value of objective function is 5 at x=0 and y=5.
The new vol = 8 times the old vol.
Therefore the sides of the cube have been made 2 times larger. (the cube root of 8 is 2.)
<span>Doubled: Volume increased 8 times
Tripled: Volume increased 27 times
Quadrupled: Volume increased 64 times
Pretty simple. If you're doubling the lengths, you're increasing them by 2 times. Take 2 and raise it to the 3rd power. If you're tripling the lengths, you're increasing them 3 times over. Take 3 and raise it to the 3rd power. And so on.
Doubled = 2^3 = 8
Tripled = 3^3 = 27
Quadrupled = 4^3 = 64
Does that make sense?</span>