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Serjik [45]
4 years ago
9

I don’t know this one

Mathematics
2 answers:
torisob [31]4 years ago
5 0

Answer:

3077.2

Step-by-step explanation:

A circle's mass is found by

Pie times R^2

7^2 is 49, times 3.14 is 153.86

then you Multiply 153.86 by 20 which gives you 3077.2

Alexxx [7]4 years ago
5 0
Volume of a cylinder = pi r^2 * h
Pi 7^2 * 20
Volume = 49 pi

Density = mass/ volume
2.5= mass/ 49 pi
Mass= density * volume
= 2.5*49 pi
= 245/2 pi
= 384.845...
=384.8 g to 1 dp


Answer= Volume
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Answer:

its B

Step-by-step explanation: just took test

5 0
3 years ago
Which is another way to check the sum of 104+34+228+877?
Alex787 [66]
The answer is digit sum method.

Digit sum method is method used to check the sum of sum numbers. If the sum of all of the digits of numbers is equal to the sum of all of the digits of the total sum, then the arithmetic process was correct.

We need to check the sum of <span>104+34+228+877:
</span>104 + 34 + 228 + 877 = 1243

Let's first summarize the digits of individual numbers:
104 *** 1 + 0 + 4 = 5
34 *** 3 + 4 = 7
228 *** 2 + 2 + 8 = 12 *** 1 + 2 = 3
877 *** 8 + 7 + 7 = 22 *** 2 + 2 = 4

Now, let's sum these sums:
5 + 7 + 3 + 4 = 19 *** 1 + 9 = 10 *** 1 + 0 = <u><em>1</em></u>

Then, let's summarize the digits of the total sum:
1243 *** 1 + 2 + 4 + 3 = 10 *** 1 + 0 = <u><em>1</em></u>

Since the sums of the digits on the both sides of equation is 1, than the arithmetic process was correct and the sum of <span>104 + 34 + 228 + 877 is really 1243.</span>

7 0
3 years ago
A store has clearance items that have been marked down by 30%. They are having a sale, advertising an additional 60% off clearan
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Answer:

28%

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8 0
3 years ago
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ziro4ka [17]
There was 125,933 fans that attended both games.
8 0
3 years ago
15. Hatice Hanım, 3 çocuğuna birer
elena-14-01-66 [18.8K]

Answer:

D

Step-by-step explanation:

Merhaba!

500-5=495

bir ayakkabı=495/3=165

Good work ;)

6 0
3 years ago
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