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3 years ago

I have a lot sorry

1 answer:

7 0

5/8 times 2- divide the top number by the bottom, then times it by the 2 6 divided by 3/5- 6 divided by the top number and then divide that number by 5 That's all I know I'm afraid hope I helped

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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

Can someone help me

DochEvi [55]

The top two ?
1. 0, 0.2, '0.4, 0.6, 0.8, 1.0, 1.2, 1.4', 1.6
2. 0, 0.5, '1.0, 1.5, 2.0, 2.5', 3.0

6 0

3 years ago

Solve using substitution <br> y= x+4<br> x-y= -4

never [62]

X-(x+4)=-4

X-x-4=-4
-4=-4

All real numbers

6 0

4 years ago

Brandi jogged 2 1/2 miles in 30 minutes. Sharna jogged 3 1/2 miles in 3/4 hour. who jogged at a slower rate.

Klio2033 [76]

You need to use the equation Distance (miles)=Rate (miles/hour) x Time (hours)

Brandi: 2.5 miles=rate (1/2 hour) r=5 miles per hour

Sharna=3.5 miles= rate (3/4 hour) r = 7 miles per hour.

Therefore brandi jogged at a slower rate.

6 0

3 years ago

Read 2 more answers

4x = -12? dgdgdgdgdgdg

jarptica [38.1K]

Answer:

-3

Step-by-step explanation:

X=-12/4

X=-3

hope it helps

7 0

3 years ago

Read 2 more answers