I have a basic exponential division question that I am pretty sure my Pearson is incorrect about.

7^n/5 / 7^n-1/5 SHOULD equal 1/7^1/5 BUT Pearson is saying the answer is 7^1/5.

Maybe I'm wrong. Help me out here. If you subtract n/5 -n-1/5 you should get -1/5, no?

edit: Oh wait... is it because 7^n/5 / 7^n-1/5 translates the denominator as a negative on top of the ruled negative?

aka 7^n/5 / 7^n-1/5 = n/5 - - n-1/5 ???

Is a positive integer raised to a negative power always positive

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.