4 years ago

I go to k12 then say hi and help me im in 8th grade plz help with math

Mathematics

1 answer:

MaRussiya [10]4 years ago

7 0

Answer:

Step-by-step explanation:

Hi! I can help you with math.

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ikadub [295]

Answer:

Following are the solution to this question:

Step-by-step explanation:

Please find the complete question and its solution file in the attachment.

6 0

3 years ago

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.

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3 years ago

Item 5 Evaluate the expression. |12(16−63)|

USPshnik [31]

564 is the answer here you go

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4 years ago

Which expression is equivalent to 3/4(3x - 5) A.-3/2x B.6x C.9/4x-15/4 D.9/4x + 15/4

andriy [413]

Answer:D

Step-by-step explanation:

You would distribute the 3/4 into both terms and by multiplying you get that answer

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3 years ago

Read 2 more answers

write an algebraic expression for each verbal expression... 1. the sum of a number and ten 2. 15 less than k 3.the product of 18

erica [24]

Answer:

Step-by-step explanation:

N+10

K-15

18*2

6+(2*m)

3*n+8

(5*n)-17

2+(y^2)

(G^4)-9

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3 years ago