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3 years ago

15

Araceli uses 6.1 pints of blue paint and white paint to paint her bedroom walls. 3/5 of this amount is blue paint, and the rest

is white paint. How many pints of white paint did she use to paint her bedroom walls?

1 answer:

kramer3 years ago

3 0

Answer:

2.44 pints of white

Step-by-step explanation:

blue=3/5

white=2/5

6.1*0.4=2.44

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The surface area of a sphere is 576pi square units. Which choice represents the volume of the sphere?

Leona [35]

Answer:

$\large\boxed{V=2304\pi}$

Step-by-step explanation:

The formula of a surface area of a sphere:

$S.A.=4\pi R^2$

R - radius

We have

$S.A.=576\pi$

Substitute and solve for R:

$4\pi R^2=576\pi$ <em>divide both sides by π</em>

$4R^2=576$ <em>divide both sides by 4</em>

$R^2=144\to R=\sqrt{144}\\\\R=12$

The formula of a volume of a sphere:

$V+\dfrac{4}{3}\pi R^3$

Substitute:

$V=\dfrac{4}{3}\pi(12^3)=\dfrac{4}{3}\pi(1728)=(4)\pi(576)=2304\pi$

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3 years ago

OK I need help the answer is c but I didn't understand the teacher explanation pls help me

serg [7]

9 - 6 + 4 - 8/3 ..,
geometric series a(n) = a1r^(n-1)

r = a(n+1)/a(n)
-6/9 = -2/3
4/-6 = -2/3
-8/3/4 = -2/3
so r = -2/3 and a1 = 9

Sn = a1(1-r^n)/(1-r) = 9(1-(-2/3)^n)/(1-(-2/3))
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solniwko [45]

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