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evablogger [386]
3 years ago
11

Please answer this question in two minutes

Mathematics
1 answer:
Stells [14]3 years ago
8 0

Answer:

D: 57 units

hope this helps!!

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Hi. im an online  tutor and i can assist you with your assignments. check out toplivewriters.com for support

Step-by-step explanation:

5 0
2 years ago
How do I do question 9 & 11? Please help thank you!
Novay_Z [31]
<h2>9.</h2><h3>Given</h3>
  • sphere with radius 15 cm
<h3>Find</h3>
  • linear approximation to the volume when the radius increases 0.4 cm
<h3>Solution</h3>

The equation for volume of a sphere is

... V = (4/3)π·r³

Differentiating gives

... dV = 4π·r²·dr

Filling in the given numbers gives

... change in volume ≈ 4π·(15 cm)²·(0.4 cm)

... = 360π cm³ ≈ 1130.97 cm³ . . . . . . volume of layer 4mm thick

<h2>11.</h2><h3>Given</h3>
  • an x by x by 2x cuboid with surface area 129.6 cm²
  • rate of change of x is 0.01 cm/s
<h3>Find</h3>
  • rate of change of volume
<h3>Solution</h3>

The area is that of two cubes of dimension x joined together. The area of each such cube is 6x², but the two joined faces don't count in the external surface area. Thus the area of the cuboid is 10x².

The volume of the cuboid is that of two cubes joined, so is 2x³. Then the rate of change of volume is

... dV/dt = (d/dt)(2x³) = 6x²·dx/dt

We know x² = A/10, where A is the area of the cuboid, so the rate of change of volume is ...

... dV/dt = (6/10)A·dx/dt = 0.6·(129.6 cm²)(0.01 cm/s)

... dV/dt = 0.7776 cm³/s

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3 years ago
if ur mom had 1 pie and subtracted one (A im a mistake B im not C my mom left or D im dad came with the milk
MaRussiya [10]

Answer:

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Step-by-step explanation:

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2 years ago
Suppose a computer virus begins by infecting 8 computers in the first hour after it is released. Each hour after that, each newl
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y=8^x&#10;\\x=1\Rightarrow y=8^1=8&#10;\\x=2\Rightarrow y=8^2=64&#10;\\x=3\Rightarrow y=8^3=512&#10;\\x=4\Rightarrow y=8^4=4,096
3 0
3 years ago
What is the opposite of the integer -4 plss thx :)
qwelly [4]

Answer:

+4

Step-by-step explanation:

any opposite of a natural number is created with a "minus"

- (-4) = +4

7 0
2 years ago
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