HELP NEEDED PLSSS

pls answer fast and make sure it’s right. also, pls show all work! tysm!!!

Average acceleration: i have no idea how to do this.

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.

I’m still confused on how to work the percentages