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3 years ago

Find the value that completes the square r^2-30r+__

Mathematics

1 answer:

babunello [35]3 years ago

6 0

$r^2-30r+225=(r-15)^2$

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postnew [5]

Answer:

Step-by-step explanation:

The surface area of a sphere with radius r is given by

S = 4 pi r^2

for a radius of 11 units,

S = 4 pi 11^2 = 484 pi = 1520.5 sq. units

This does not correspond to any of the answers.

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2 years ago

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Answer:

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Step-by-step explanation:

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