"ana and her friends are hiking a trail that is 8 1/4(fraction one over four) miles long. they want to finish the trail in 3 hours. how many miles must they hike each hour? " : : note; don't answer the question, answer this; would i be using multiplying or dividing?

Item 1 which question could the expression 1000n answer? let n = the number of gallons of gas used. how many miles per gallon did the car get driving 1000 miles? let n = the number of grams of food needed for each dog. how many grams of food are needed to feed 1000 dogs? let n = the number of people at the show. how many empty seats were there at the show if there are 1000 seats at the theater? let n = the number of seats at the theater. how many empty seats will there by if 1000 people come to the show?