Pepper jackie has 7.5 bags of much to cover

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?