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netineya [11]
3 years ago
12

The equation of a circle is x^2 + y^2= 42.25 Find the radius of the circle.

Mathematics
1 answer:
poizon [28]3 years ago
7 0

Answer:

radius = 6.5

Step-by-step explanation:

The equation of a circle centred at the origin is

x² + y² = r² ( where r is the radius )

x² + y² = 42.25 ← is in this form

with r² = 42.25 ( take the square root of both sides )

r = \sqrt{42.25} = 6.5

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Answer:

<h2>8 times greater</h2>

Step-by-step explanation:

The formula of a volume of a cube:

V=a^3

a - edge length

-----------------------------------

The edge length of cube B is a.

The edge length of cube A is 2a.

Calculate the volumes:

V_A=(2a)^3=2^3a^3=8a^3\\\\V_B=a^3

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Make the quotient:

\dfrac{V_A}{V_B}=\dfrac{8a^3}{a^3}=8

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2 years ago
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2 years ago
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3 years ago
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For the school play,adult tickets cost $4 and children tickets cost $2. Natalie is working at the tickets counter just sold $20
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5 0
2 years ago
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zhenek [66]

Answer:

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Step-by-step explanation:

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3 years ago
Read 2 more answers
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