Which number is written in scientific notation a.4.5*10^-3 b.14.5*10^2 c.0.78*10^-6 d.5.7*4^8 which number is greatest a.2.89*10^-8 b.1.997*10^2 c.8.9*10^-6 d.5*10^-6

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.