Answer: 
Step-by-step explanation:
If the volume of a sphere is

Where
is the radius
The volume of a hemisphere is half the volume of the total sphere:


Solving this equation:

Finally:

W-13=15|+13
w=15+13
x=28
<em>Answer: w=28</em>
Answer:
Hello
Step-by-step explanation:
the Pythagoras Theorem proves this
Number of students on a sports team
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Multiply and divide by the conjugate of the denominator, which is

The numerator is a square of a sum, and the denominator is the product of a difference and a sum (product of two conjugates). Then, expand the common products:

I hope this helps. =)