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alexira [117]
3 years ago
15

How do I do question 11? Please help me thank you

Mathematics
1 answer:
aleksley [76]3 years ago
5 0
<h3>Given</h3>
  • length, width, and height of a cuboid are x, x, and 2x, respectively
  • the cuboid's surface area is 129.6 cm²
  • dx/dt = 0.01 cm/s
<h3>Find</h3>
  • dV/dt for the given conditions
<h3>Solution</h3>

The equation for surface area can be written

... A = 2(LW +H(L +W))

Substituting the given values gives an equation that we can solve for x

... 129.6 = 2(x·x +2x(x +x)) = 10x²

... x = √(129.6/10) = 3.6 . . . . . . . cm

The equation for volume can be written

... V = LWH

Substituting the given values gives an expression for volume in terms of x.

... V = x·x·2x = 2x³

Then the rate of change of volume is

... dV/dt = 6x²·dx/dt

... dV/dt = 6·(3.6 cm)²·(0.01 cm/s)

... dV/dt = 0.7776 cm³/s

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QUICK HELP!!!!!!!!!!!!!!!!
JulijaS [17]

Answer:

Its C im pretty sure. Also loveee your pfp!

3 0
3 years ago
What is mKNL?<br> Enter your answer in the box.
sergejj [24]

Answer:

102°

Step-by-step explanation:

As the vertically opposite angles are equal,

5x+2={3(x+14)

Now let's solve for x now

5x+2=3(x+14)\\

5x+2=3x+42

5x-3x=42-2

2x=40

\frac{2x}{2} =\frac{40}{2}

x=20 \\

Now let's find the value of KNL

3(x+14)\\3(20+14)\\3*34\\102

Hope this helps you.

Let me know if you have any other questions ;-)

5 0
3 years ago
I don’t know how to do this math problem
Svetach [21]

Answer:

I'll help

Step-by-step explanation:

No worries man

3 0
3 years ago
Read 2 more answers
Mark has a piece of wood 4 1/4 feet long. Tony has a piece of wood 1 2/4 feet long. How much wood do the boys have altogether. p
Alona [7]
They have 5 3/4 ft

4+1=5
1/4+2/4=3/4


but hey, its not the length of your wood that matters, its how you use it XD
8 0
4 years ago
The sum of two numbers is 131. One number is 6 more than 4 times the other. Which of the following is the smaller number
sertanlavr [38]

Answer: oop

Step-by-step explanation:

Let X = smaller number

Let Y = larger number

Sum of numbers is 130 ==> X + Y = 130 ==> Y = 130 - X

4 times the smaller subtracted from the larger is 10 ==>

Y - 4*X = 10

Substitute the value for Y in to the 2nd equation

(130 - X) - 4*X = 10

130 - 5*X = 10

-5*X = -120

X = 24

Y = 130 - 24 = 106

Check: 24 + 106 = 130

106 - 4*24 = 106 - 96 = 10

3 0
3 years ago
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