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Answer: 
Step-by-step explanation:
See file attached
Answer:
for number 7
Step-by-step explanation:
a²+b²=c²
3²+8²=c²
9+64=c²

A cone is 1/3 the volume of a cylinder so 1/3 * (π r^2) * height
remember r = 1/2 the diameter
Answer:
-<u> 55 </u> = -6.88
8
Step-by-step explanation:
5 X 5 / 8 - 10
<u> 5² </u> - 10
8
<u> 25 - 80 </u>
8
-<u> 55 </u> = -6.88
8
The answer to your problem is simple... 62.4
if you're not looking for decimals, you can't. 5 doesn't go into 312.