Jamar bought 2 books for $ 9.95 each, and 5 magazines for $3.25 each. what was the total cost for his purchases ?

9.95 + 9.95                 3.25+3.25                       3.25+3.25                 6.50+6.50
    19.80                         6.50                                   6.50                         13.00
 13.00+3.25                16.25+19.80
     16.25                             36.05

So your answer is 36.05
 
                                                                                                                              

To find this out, divide the people by miles to find how many people in each mile:

626,011/9,620 = 65.07

So the population density is 65.07 people per square mile.

Hope this helps!