The number of hours per day a college student spends on homework has a mean of 4 hours and a standard deviation of 0.75 hours. yesterday she spent 3 hours on homework. how many standard deviations from the mean is that?

What is the value of the digit 1 in the number 13?

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?

Drag each tile to the correct box. not all tiles will be used. consider the recursively defined function below. create the first five terms of the sequence defined by the given function