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nordsb [41]
3 years ago
5

Need help on #18 i don't know how to set this up

Mathematics
1 answer:
AleksAgata [21]3 years ago
7 0

Check the picture below.

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How does the volume of an oblique cone change if the height is reduced to 2/3 of its original size and the radius is doubled
spayn [35]

The volume of oblique cone =\frac{1}{3} \pi r^{2} h

Now radius is doubled is now it is 2r

And height is reduced to 2/3 of its original size that is 2/3 h

So plugging the values we get volume

New Volume = \frac{1}{3} \pi (2r)^2 (\frac{2}{3} h)

= \frac{1}{3} \pi 4r^2 (\frac{2}{3} h) = \frac{8}{6} \pi r^{2} h =\frac{8}{2} (\frac{1}{3} \pi r^{2} h )=4*(\frac{1}{3} \pi r^{2} h )

It means the volume becomes 4 times

3 0
3 years ago
On a map, the scale shown is 1 inch: 20 miles. If a city is 900 square miles, what is the area of the city on the map?
WITCHER [35]

Answer:

2.25 square inches

Step-by-step explanation:

we know that

The scale is 1\ inch: 20\ miles

That means

1 inch on a map represent 20 miles in the city

so

An area of (1)(1)=1\ in^2 on a map represent an area of (20)(20)=400\ mi^2 in the city

Applying proportion

\frac{1}{400}\ \frac{in^2}{mi^2}=\frac{x}{900}\ \frac{in^2}{mi^2}\\\\x=900/400\\\\x=2.25\ in^2

3 0
3 years ago
Please Help !!!!!!!!!!!
Tanya [424]

Answer:

your answer is b and e your welcome

6 0
3 years ago
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What is the age of Alps mountain​
DIA [1.3K]

Step-by-step explanation:

The Alps were born 770 million years ago.

Hope this helps..

5 0
3 years ago
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On the unit circle, where I <0<2, when is tan 0 undefined?
Ilya [14]

Answer:

can you please be more specific? Maybe add more info.

Step-by-step explanation:

7 0
3 years ago
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