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Elina [12.6K]
3 years ago
13

I HATE MYMATHS HELP ME PLSSSS

Mathematics
1 answer:
Sladkaya [172]3 years ago
6 0

Answer:

801 metres

Step-by-step explanation:

To find the distance we must firstly find the circumference of the wheel;

⇒ C = \pi d = \pi (85) = 85\pi cm

If the wheel made 300 full revolutions, then we multiply the circumference by 300;

⇒ d = 300(85\pi ) = 25500\pi

We can now convert this to decimal to give our distance cm. Therefore we must then divide our answer by 100 to get the distance in metres;

⇒ d = 25500\pi  = 80111cm = 801m

Hope this helps! :D

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2.8 if rounded, If not rounded, 2.77

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May someone help me out with this question please
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Find the cost of painting a cubical block of side length 3.2 cm, if painting costs $5 per cm2.
SashulF [63]
<h3><u>Answer</u>:- </h3>

\longrightarrow \sf \$ \: 307.2

<h3><u>Solution:-</u></h3>

Since painting is done on outer surface of cubical block we will have to find its surface area which is given by-

\green{ \underline { \boxed{ \sf{Surface \: area  \:of  \:Cube = 6a^2}}}}

  • <u>where a is side of the cube </u>

\begin{gathered}\\\quad \sf Surface \: area  \:of  \:Cube = 6\times(3.2)^2  \\\end{gathered}

\begin{gathered}\\\implies \quad \sf  6\times 3.2\times3.2   \\\end{gathered}

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3 years ago
PLEASE HELP QUICK, I NEED IT
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We take the equation <span>d = -16t^2+12t</span> and subtract d from both sides to get
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                                           = [- 12 ± √(144-64d) ] / (-32)
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                                           = [- 12 ± 4√(9-4d)] / (-32)
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