7th grade math help me pleasee

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?