What app can i use to give a reponse to others feedback

depending on what kind of peoples responses you want there are multiple. there's always survey monkey or lime survey.

Explanation:

these two sites are out of many and are recently used in the year 2019 there ratings are high and they may be what your looking for.

answer; to open a new transaction, the user should type the code/0 along with a new transaction code, when done with that the user should press enter to open the transaction; good luck;

answer/// there is an inverse relationship between price and quantity demanded;