Avolleyball club charges players a $20 court fee plus a $10 hourly charge with a 4-hour maximum. a posted list of the total charges for 1, 2, 3, or 4 hours forms an arithmetic sequence. what is the second term and what is the common difference?

Megan is making bracelets to sell to earn money for the local animal shelter. it takes her 1/4 hour to pick out all the beads and 1/10 hour to string them.this week, she only has 5 1/4 hours to make bracelets. how many bracelets will megan be able to make?