2 years ago

suppose two rectangles are similar with a scale factor of 2. what is the ratio of their areas? explane

Mathematics

1 answer:

Papessa [141]2 years ago

6 0

Ratio of areas is always cubed. Lengths are always squared

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3 years ago

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127.5 is what percent of 51?

poizon [28]

Multiply 1.275 with 51 to get the answer (65.025)

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3 years ago

if the height of the cylinder with a radius of 12 cm and a height of 20 cm has the same volume as a cone with a radius of 8 cm.

Marrrta [24]

Answer:

$\large\boxed{H=135\ cm}$

Step-by-step explanation:

The formula of a volume of a cylinder:

$V=\pi r^2H$

r - radius

H - height

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The formula of a volume of a cone:

$V=\dfrac{1}{3}\pi r^2H$

r - radius

H - height

We have the radius r = 8cm and the volume V = 2880πcm³. Substitute:

$\dfrac{1}{3}\pi(8^2)H=2880\pi\qquad\text{divide both sides by}\ \pi\\\\\dfrac{1}{3}(64)H=2880\qquad\text{multiply both sides by 3}\\\\64H=8640\qquad\text{divide both sides by 64}\\\\H=135\ cm$

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3 years ago

The college team won 30 games last year. This year it won 25 games what was the percent decrease of games won?

babymother [125]

Since it decreased by 5 do 5 divided by 30 and you get the answer to be 16%

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3 years ago

If a 30 foot ladder is positioned so that the bottom of the ladder is 1/4 of its length away from the wall, how far up the wall

klio [65]

Answer:

7.5

Step-by-step explanation:

I divided 30 by 4 and got 7.5

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