First set up the equation:

+

Now solve the ones in the parenthesis:

+

Then do the exponents:
25+64
The answer will be:<u> </u>
<u>89
</u>Hope this helps!
<u>
</u>
Only 20%of earths water is useable
Do 13 times 14 times 13 times 5 and then divide by however many sides there are on the shape . I think
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d the answer is 73 degrees
The surface area of a sphere is

where r is the radius;
The circumference is

so that

using this value we can evaluate the surface area of 1 ball as:

For 100 ball you get: