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otez555 [7]
3 years ago
13

Solve 0= 2t^3-21t^2+ 40t

Mathematics
1 answer:
sukhopar [10]3 years ago
4 0
0=2t^3-21^2+40t
switch sides
2t^3-21t^2+40t=0
solve factoring 
t(t-8)(2t-5)=0
using the zero factor principle
t=0

solve
t-8=0:t=8
solve
2t-5=0:t= \frac{5}{2}
t=0,t=8,t= \frac{5}{2}
Hope this helps

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If the sum of four consecutive numbers is n, what is the first one?
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4 0
3 years ago
Can someone help me with the LxWxH of a sphere and a cylinder plz
kotykmax [81]

<em>L x W x H</em> is what you use to find the volume of a parallelopiped ...
like a cube or a box.

Cylinders and spheres don't have lengths or widths, and spheres
don't have heights either.  The formulas for their volumes look different.

Cylinders and spheres both have a 'radius' ... that's the distance from
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it's just the distance from the center of the sphere to the surface, because
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Both formulas also involve the number called 'pi'  (PIE).  It's the number
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and a lot of other things in math and science.  The thing about 'pi' is
that it's impossible to write its exact value with digits ... the decimal
part of it keeps going and going and never ends.  The beginning
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In school, most teachers tell you to use 3.14  for pi.  The answers
you get aren't exactly correct, but that's not a big deal, because the
answer is never the important part of the problem in school.  The
important part is that you LEARN HOW to solve the problem and
find the answer.

In math and science writing, when pi has to be written down, it's
usually not written with digits at all.  It's usually written with the
letter from the Greek alphabet called pi.  It looks like this:  π

Now, here are the formulas you asked for, for the volumes of cylinders
and spheres:

<u>For a cylinder:</u>        <em>V =  π R² H</em>

              Volume = (pi) x (square of the radius) x (height of the cylinder)

                           square of the radius means ( R x R )


<u>For a sphere:</u>          <em>V = (4/3) π R³</em>

               Volume = (4/3) x (π) x (cube of the radius)

                                       cube of the radius means ( R x R x R )

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Answer:

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