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2 years ago

If the area of a circle is 81π, then what is the diameter of the circle?

Mathematics

1 answer:

viva [34]2 years ago

7 0

Answer:

Step-by-step explanation:

81π=πr^2

r= 9,-9

9+9=18

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Please include work! :)

UNO [17]

Answer:

m = 13.

Step-by-step explanation:

Recall that adding logarithmic equations, (ex: log a + log b) is the same as log (a·b). Therefore:

log 12 + log 5 = log (4m + 8)

log (12·5) = log (4m + 8)

log (60) = log (4m + 8) **Ignore 'Log' to solve for 'm'

60 = 4m + 8 **Subtract both sides by 8

52 = 4m **Divide both sides by 4

m = 13.

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3 years ago

Find the missing length <br> . Leave your answers in simplest radical form

Aloiza [94]

A^2 + B^2 = C^2

x^2 + 9^2 = (SQRT 226)^2

x^2 + 81 = 226

x^2 = 145

x = SQRT 145

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3 years ago

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8_murik_8 [283]

Answer:

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Step-by-step explanation:

In pic

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If the area of a circle is 81π, then what is the diameter of the circle?​

If the area of a circle is 81π, then what is the diameter of the circle?