Please help me with advanced algebra?

Posted on 2016-04-05 18:56:00 in Math by LOLY

Madison has the 48 ft of fence with which to the fence in a rectangular garden. 
What is the maximum area she can enclose? 

The population density of a region is 112 people/mi 
The area of the region the people populat is 17 mi^2. 
How many people live in the region? 

Argentina has a population density of about 15 people/km^2 and population of about 41,803,125. What is the approximate area of Argentina? Round to the nearest whole number. 

A lead weight has a volume of 8cm^3 and a mass of 108 g. 
What is the density of the lead? 

116g/cm^3 
13.5g/cm^3 
864g/cm^3 
0,07g/cm^3

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