Answer:
N=17
?=15
Explanation;
Check out my attached work
Hope it helps, let me know if you have any questions
Part (a)=======
See the attached figure which represents the problem.
So, we can note that there are 3 hours increase from <span>Monday thru Friday
</span>
and 4 hours increase in both of Saturday and Sunday
So, <span>
the increase in total hours opened = 3*5 + 4*2 = 23 hours</span>
<span>======================================================
</span>
<span>
Part (b):</span>
<span>=====
</span>
<span>weekly original payroll $ 385
</span>
Total working of old hours = 9 * 5 + 5 * 2 = 55 hours
so, the hourly payroll = 385/55 = $ 7
<span>Assume the hourly wage will stay the same
</span>
Total working of new hours = 55 + 23 = 78 hours
So, the total weekly pay under the new hours = 78 * 7 = $ 546=====================================================
Part (c):
========
The total pay for old hours = $ 385
The total pay for new hours = $ 546
The increase in the total pay = 546 - 385 = $ 161
<span>
The percentage increase in total pay = 
</span>
The surface area of the sphere is given by the equation
,
where A is the surface area and r is the radius.
We want to find the volume of the sphere, which is given by the equation
,
where V is the volume and r is the radius.
Looking at these equations, we see that they both involve the sphere's radius. If we know what r is, we can calculate the volume.
We know that the sphere's surface area is
. Plugging that in for A in the surface area equation, we get
, then divide by 
, then divide by 4
, then take the square root of both sides

So the radius of the sphere is 3. Plugging this into the volume equation,
, simplify terms
, multiply
by 27

So the volume of the sphere is
.
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