What would the population density be if one billion people each stood on adjacent 2-foot by 2-foot squares?

What is the 12th term of b(n)=-4-2(n-1)

Three times the sum of a number and seven is negative thirty-six. what is the number?

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?