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3 years ago

15

Which is the best definition of a conic section

2 answers:

slega [8]3 years ago

7 0

Are there options? Otherwise the definition is: <span>a figure formed by the intersection of a plane and a right circular cone. Depending on the angle of the plane with respect to the cone, a conic section may be a circle, an ellipse, a parabola, or a hyperbola.
</span>

jek_recluse [69]3 years ago

5 0

It is the figure formed by the intersection of a plane and circular cone!

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What's 4 2/3 times 2

Hoochie [10]

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3 years ago

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4 years ago

The circumference of a circle is 28. Contained in that circle is a smaller circle with area 36π. A point is selected at random f

Marrrta [24]

Answer:

$Pr = \frac{9}{49}$

Step-by-step explanation:

Given

$d = 28$ --- big circle

$A_2 = 36 \pi$ --- area of small circle

Required

Probability that a point selected lands on the small circle

Calculate the area of the big circle using;

$A_1 = \pi r^2$

Where

$r = d/2$

So, we have:

$r = 28/2 = 14$

This gives:

$A_1 = \pi * 14^2$

$A_1 = \pi * 196$

$A_1 = 196\pi$

The probability that a point selected lands on the small circle is calculated by dividing the area of the small cicle by the big circle

This gives:

$Pr = \frac{36\pi}{196\pi}$

$Pr = \frac{36}{196}$

Simplify

$Pr = \frac{9}{49}$

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