If u wrote 9 to the power of - 2 and x to the power of - 1 and y to the power of 0 and write the x at then end it would end up a fraction of 1/81 but I'm not sure what u want like multiply?
Seven and twenty five hundredths, or seven and a quarter
The probability of gettings heads is 50%.
Im pretty sure it would be 6x