In a city of 40,000 homes, a survey was taken to determine the number with wi-fi access. of the 400 homes surveyed, 320 had wi-fi access. estimate the number of homes in the city that have wi-fi access.
homes

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

What 8/12+8/11 in another way than and improper fraction

I'm confused on how to solve the triangle. can someone me ?