Use the model =APert or =AP+1rnnt, where A is the future value of P dollars invested at interest rate r compounded continuously or n times per year for t years. If $15,000 is invested in an account earning 7.5% interest compounded continuously, determine how long it will take the money to double. Round up to the nearest year.

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.