What is the value of the expression with base 2 and exponent 5

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

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15