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sweet-ann [11.9K]
3 years ago
10

Hi, can someone help with my geometry homework?

Mathematics
1 answer:
hammer [34]3 years ago
8 0
The answer is letter C.
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What is the volume of a hollow ball whose other radius is 200m and inner radius of 100m? What is the mass if it is iron?
kati45 [8]

Solution :

Volume of ball = Volume of outer ball - Volume of inner ball

V = \dfrac{4\pi R^3}{3} - \dfrac{4 \pi r^3}{3}\\\\V = \dfrac{4\pi}{3}( R^3 - r^3 )\\\\V = \dfrac{4\pi}{3}( 200^3 - 100^3 )\\\\V = \dfrac{4\pi}{3}(2^3 - 1^3) \times 10^6\\\\V = 2.93 \times 10^7 \ m^3

Now, density of iron is, d = 7300 kg/m³.

So, mass of iron ball is :

m = d\times V\\\\m = 7300\times 2.93 \times 10^7 \ kg\\\\m =  2.14 \times 10^{11}\ kg

Hence, this is the required solution.

5 0
3 years ago
M is the Midpoint of segment PQ. If PQ = 30 and PM = 3x, find the VALUE OF X<br>​
NemiM [27]

Answer: X=5

Step-by-step explanation: If PQ equals 30 then PM will equal half of PQ. Which means that PM will equal 15, which means x= 5 because 3 times 5 equals fifteen.

5 0
3 years ago
Read 2 more answers
Help please thank you!
xenn [34]

Answer:

ok

Step-by-step explanation:

7 0
3 years ago
The larger of two numbers is five more than twice the smaller. The difference is thirteen. Find numbers.
KIM [24]
The numbers are x and y
x>y

x=5+2y

x-y=13
so
sub 5+2y for x
5+2y-y=13
5+y=13
y=8

sub back
x-y=13
x-8=13
21=x

the numbres are 21 and 8
4 0
3 years ago
HELP ME Please i beg you can you help me!!!!
e-lub [12.9K]

Answer:

Ping is incorrect because each term in pattern b is 3 times the corresponding term in pattern a

7 0
3 years ago
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