1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kobotan [32]
3 years ago
6

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
Mathematics
1 answer:
strojnjashka [21]3 years ago
4 0
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>
You might be interested in
what is the first step used in solving this equation 2x+9y=28 and 3x-3y=14. Identify the variable that will be solved for when y
umka2103 [35]

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.

7 0
3 years ago
HELP PLEASE <br> solve the right triangle
vodomira [7]

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

Hope this helps

7 0
3 years ago
Question 20: Please help what are sin x and cos x?
sweet [91]

Answer:

A is the correct answer.

Step-by-step explanation:

\tan x =   \frac{6}{8}  =  \frac{opposite \: side \: to \:  \angle \: x}{adjacent \: side \: to \:  \angle \: x}  \\  \\ hypotenuse  \\ =  \sqrt{ {(opp. \: side)}^{2} +  {(adj. \: side)}^{2}  }  \\  =  \sqrt{ {6}^{2} +  {8}^{2}  }  \\  =  \sqrt{36 + 64}  \\  =  \sqrt{100}  \\  = 10 \\  \\ \because  \sin (x) =  \frac{opposite \: side \: to \:  \angle \: x}{hypotenuse}  \\  \\   \huge{ \red{ \boxed{\therefore \: \sin (x) =  \frac{6}{10}}}}  \\  \\ \cos (x) =  \frac{adjacent \: side \: to \:  \angle \: x}{hypotenuse}  \\  \\  \huge{ \purple{ \boxed{\therefore \: \cos (x) =  \frac{8}{10} }}} \\

Thus, option A is the correct answer.

8 0
3 years ago
Find the solution to the system of equations.
N76 [4]

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 .

5 0
3 years ago
A 16 ounce package of hamburger meat has 3% fat how much of the total package is fat
Oxana [17]
0.48 ounces

1% of 16 is 0.16

3 x 0.16 = 0.48
8 0
3 years ago
Other questions:
  • A jet plane traveling at 450 mph overtakes a propeller plane traveling at 250 mph that had a 3​-hour head start. How far from th
    12·2 answers
  • The spending limit on John’s credit card is given by the function f(x)=15,000+1.5x , where x is his monthly income. f^-1x . The
    12·1 answer
  • How do you write 3.6 as a mixed number in the simplest form?
    13·1 answer
  • Given f(x) = the quantity of x minus 1, divided by 2, solve for f−1(5). 2 9 11 15
    8·2 answers
  • Which best description the central idea of an informational text
    12·2 answers
  • The tax rate for the town of Stanton is $2.536 per$100. Find Mikes tax bill if his property in Stanton is assessed at $72,000.
    14·1 answer
  • Gary ordered 30 pizzas for a party.
    12·2 answers
  • Simplify the expression (2−3i) (5+i) by distributing. Express your answer in a+bi form, Step by Step.
    10·1 answer
  • Please help me I cant figure it out.
    6·1 answer
  • Math help pls pls help urgent
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!