3 years ago

Please help! What is the discriminant D of the equation? a^2-2a+5=0

Mathematics

1 answer:

miskamm [114]3 years ago

5 0

Anybody know? I need this

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3 years ago

If the cylinder above is similar to a second cylinder that has a radius of 10mm, what is the height of the second cylinder

julsineya [31]

Answer:

The height of the second cylinder is 30mm

Step-by-step explanation:

Given

Cylinder 1:

$R = 15mm$

$H = 45mm$

Cylinder 2

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See attachment

Required

Determine h, the height of the small one

To do this, we make use of the following equivalent ratios;

$R : H = r : h$

This gives:

$15 : 45 = 10 : h$

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$\frac{15 }{ 45 }= \frac{10 }{ h}$

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2 years ago

Why is -csc^2 (pi/4) = -2 ?

sweet-ann [11.9K]

Sin(pi/4) = 1/sqrt(2)
csc(pi/4) = sqrt(2)
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