Please answer this as soon as possible!! ASAP Simplify to a single power of 2: 2^7/2^5

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Angela is buying a dress that is on sale for 20% off. if the original price of the dress is $40.00, how much money is angela saving on the dress? a. $0.80 b. $3.20 c. $32.00 d. $8.00

How many four digit even numbers can be formed from digits 1,2,3,4,5 if repetition is allowed. how can solve this using permutation formula