If 1200 cm^2 of material is available to make a box with a square base and an open top find the largest possible volume of the b ox
1 answer:
Surface area of box=1200 cm² <span>Volume of box=s²h </span> <span>s = side of square base </span> <span>h = height of box </span> <span>S.A. = s² + 4sh </span> <span>S.A. = surface area or 1200 cm², s² = the square base, and 4sh = the four 'walls' of the box. </span> <span>1200 = s² + 4sh </span> <span>1200 - s² = 4sh </span> <span>(1200 - s²)/(4s) = h </span> <span>v(s) = s²((1200 - s²)/(4s)) </span> <span>v(s) = s(1200 - s²)/4 . </span> <span>v(s) = 300s - (1/4)s^3</span> by derivating <span>v'(s) = 300 - (3/4)s² </span> <span>0 = 300 - (3/4)s² </span> <span>-300 = (-3/4)s² </span> <span>400 = s² </span> <span>s = -20 and 20. </span> again derivating <span>v"(s) = -(3/2)s </span> <span>v"(-20) = -(3/2)(-20) </span> <span>v"(-20) = 30 </span> <span>v"(20) = -(3/2)(20) </span> <span>v"(20) = -30 </span> <span>v(s) = 300s - (1/4)s^3 </span> <span>v(s) = 300(20) - (1/4)(20)^3 </span> <span>v(s) = 6000 - (1/4)(8000) </span> <span>v = 6000 - 2000 v=4000</span>
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Answer:
Multiply the second equation's terms by 3. Solve for x.
Step-by-step explanation:
You will get:
2x+9y=28
9x-9y=42
Add them to get:
11x=70.
You can solve from there.
Yo sup??
by Pythagoras theorem we can say that
DE²=3²+2²
=9+4
DE=√13
=3.60 units
angle D=tan-1(2/3)
=33.7
angle E=tan-1(3/2)
=56.3
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Answer:
A is the correct answer.
Step-by-step explanation:
Thus, option A is the correct answer.
Answer:
x = -2, y = 5.
Step-by-step explanation:
y=−4x−3
y=−2x+1
Because y is common to both left sides:
-4x - 3 = -2x + 1
-4x + 2x = 1 + 3
-2x = 4
x = 4/-2
x = -2.
So y = -4(-2) - 3
= 8 - 3
= 5 .
0.48 ounces 1% of 16 is 0.16 3 x 0.16 = 0.48