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3 years ago

What’s the volume of the pyramid in the diagram?

Mathematics

1 answer:

dusya [7]3 years ago

6 0

The volume is 675 because when you multiply 20x15 you get 300 and when you multiply 25x15 you get 375. When you add 375+300 you get 675 as your volume.

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What's greater the first one or the second one

alukav5142 [94]

Answer:

what

Step-by-step explanation:

you did not provide an image or anything

3 0

3 years ago

PLZ HELP!

Tanya [424]

Answer:

B. 60cm^3

Step-by-step explanation:

The volume of a right triangular prism is

V = BH where B is the area of the triangle and H is height

B = 1/2 bh where b =5 and h =8

B = 1/2 *40 = 20

V = (20) * 3

V = 60 cm^3

We need to be careful to do the area of the triangle first

8 0

4 years ago

Find dy/dx and d2y/dx2. x = cos(2t), y = cos(t), 0 < t < π

pogonyaev

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\frac{\mathrm dy}{\mathrm dt}}{\frac{\mathrm dx}{\mathrm dt}}$

$y=\cos t\implies\dfrac{\mathrm dy}{\mathrm dt}=-\sin t$
$x=\cos2t\implies\dfrac{\mathrm dx}{\mathrm dt}=-2\sin2t=-4\sin t\cos t$
$\implies\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{-\sin t}{-4\sin t\cos t}=\dfrac14\sec t$

Let $z=\dfrac{\mathrm dy}{\mathrm dx}$ . Then

$\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm dz}{\mathrm dx}=\dfrac{\mathrm dz}{\mathrm dt}\dfrac{\mathrm dt}{\mathrm dx}=\dfrac{\frac{\mathrm dz}{\mathrm dt}}{\frac{\mathrm dx}{\mathrm dt}}$
$\implies\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\frac{\mathrm d}{\mathrm dt}\left[\frac14\sec t\right]}{-4\sin t\cos t}=\dfrac{\frac14\sec t\tan t}{-4\sin t\cos t}=-\dfrac1{16}\sec^3t$

4 0

4 years ago

logan had a bank account balance of 287 he then deposit 35 and went on a shopping trip if he spends 78 what is his new balance a

gizmo_the_mogwai [7]

The answer is 244 because you add 35 to 287 then subtract 78 and it equals 244

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4 years ago

What kind of ski slope would a beginner use

Pepsi [2]

I would use a small, easy slope.

8 0

3 years ago