HElp again for the last time if i dont get it wrong ;-;

What is this inequality notation? t is less then or equal to 2

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days