Answer:
C. 105 
Step-by-step explanation:
<em><u>The formula for a regular polygon is:</u></em>
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→ p is the perimeter and a is the apothem

105
I'm not 100% sure what you want me to do with this but i hope this helps:
x < -3
or if you want me to flip the sign then the solution becomes
x > -3
Answer:
2
Step-by-step explanation:
1.0g/cm3 means that the mass of one cm3 is 1.0g
The easiest method to use is the rule of three, and let x be the mass of 10.0 cm3 of water
1g -- > 1.0 cm3
x --> 10.0 cm3
x= (10*1)/1
x=10.0 g
So the mass of 10.0 cm3 of water is 10.0g
Hope this Helps! :)