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Oksanka [162]
3 years ago
13

Find the volume of the sphere .

Mathematics
1 answer:
mars1129 [50]3 years ago
8 0

Answer:

1436.8cm³

Step-by-step explanation:

Formula :

\frac{4}{3}  \times \pi \times r ^{3}

\frac{4}{3}  \times \pi \times 7^{3}

=1436.75504cm³

to 1dp

=1436.8cm³

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Simplify the following expression. 2^2 • 2^3
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Step-by-step explanation:

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The sum of two rational numbers of 63, and their difference is 12? What are the numbers?
VladimirAG [237]

Answer:

The two numbers are 37.5 and 25.5

Step-by-step explanation:

Comment

Let the two numbers be x and y

Equations

x + y = 63

x - y =  12

Solution

Add the two equations. The ys cancel out.

2x = 75               Divide by 2

2x/2 = 75/3         Do the division

x = 37.5

Now use one of the given equations to solve for y

x + y = 63

x = 37.5

37.5 + y = 63                     Subtract 37.5 from both sides

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y = 25.5

Check

x - y =? 12

37.5-25.5 =? 12

12 = 12      

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