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4 years ago

a forest ranger can see for a distance of 12 miles from a firetower. how many square miles can he observe?

Mathematics

1 answer:

Zolol [24]4 years ago

6 0

That would be a circle whose radius is 12 miles

= pi * 12^2 = 144pi = 452.4 sq miles to nearest tenth.

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3 years ago

I need help with this onehelp me please I have to show work too

adoni [48]

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4 years ago

17. A hemisphere of lead of radius 7 cm is cast into a right circular cone of height 49 cm. Find

Pavlova-9 [17]

Answer:

$r = 3.74cm$

Step-by-step explanation:

Given

Hemisphere

$Radius = 7cm$

Cone

$Height = 49m$

Required

Determine the radius of the cone

First, we calculate the volume (V1) of the hemisphere.

$V_1 = \frac{2}{3}\pi r^3$

Substitute 7 for r

$V_1 = \frac{2}{3}\pi * 7^3$

$V_1 = \frac{2}{3}\pi * 343$

$V_1 = \frac{686}{3}\pi$

Volume (V2) of a cone is:

$V_2 = \frac{1}{3}\pi r^2h$

Because the lead is cast into a cone, then they have the same volume.

So, we have:

$\frac{686}{3}\pi = \frac{1}{3}\pi r^2h$

$686 = r^2h$

Substitute 49 for h

$686 = r^2 * 49$

Divide both sides by 49

$r^2 = \frac{686}{49}$

$r^2 = 14$

$r = \sqrt{14$

$r = 3.74cm$

<em>Hence, the radius of the cone is 3.74cm</em>

5 0

3 years ago

HELP PLEASE!! I will appreciate it!

Fofino [41]

Answer:

i think it is around 38° maybe

Step-by-step explanation: yeah.. i don't know it step-by-step. i just used my calculator like it said. are we supposed to know step-by-step? sorry..

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3 years ago

F(x)=49 range and domain

SpyIntel [72]

Answer:

here domain is x and range is 49

7 0

3 years ago