Debbie's backyard deck cost $56.00 per square meter to build. The deck is 9 meters wide and 9 meters long. How much did it cost to build the deck?

Can someone me out here and the tell me the greatest common factor

The gdp is $1,465.2 billion. the population is 249,793,675. find the per capita gdp.

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same