Can someone help me on this? IN NEED OF HELP!

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

Which of the following values cannot be probabilities? 0.08, 5 divided by 3, startroot 2 endroot, negative 0.59, 1, 0, 1.44, 3 divided by 5 select all the values that cannot be probabilities. a. five thirds b. 1.44 c. 1 d. startroot 2 endroot e. three fifths f. 0.08 g. 0 h. negative 0.59

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73