2n − 2n + 4n = 20 solve for n

Mathematics

2 answers:

olga2289 [7]2 years ago

3 0

2n-2n+4n=20

combine like terms→4n=20

divide both sides by 4→4n/4=20/4

n=5

Rashid [163]2 years ago

3 0

First we must figure out 2n-2n. This will equal 0n, or 0. Then, this means that 4n is equal to 20. As follows,

4×5=20
n=5

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A regulation basketball has a diameter of about 9 in. What is the best approximation for the volume of this ball? 3050 in³ 382 i

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The best apporximation for the volume of this ball is 382 cubic inches.

<h3>What is the volume of the ball?</h3>

The volume of the ball is calculated by the formula V = 4 / 3πr³. This formula is the same in the whole world.

Given

A regulation basketball has a diameter of about 9 in.

The radius of the ball is;

$\rm Radius = \dfrac{Diameter}{2}\\\\Radius=\dfrac{9}{2}\\\\Radius=4.5\ inches$

The volume of the ball is;

$\rm Volume =\dfrac{4}{3}\pi r^3\\\\Volume=\dfrac{4}{3} \times 3.14 \times 4.5^3\\\\Volume =\dfrac{144.53}{3}\\\\Volume = 381.51\\\\Volume = 382 \ In^3 \ apporx$