How many times do you need to multiply by ten to get from 8.4546 to 8454.6?

For the equations below which statement is true ?

Nine more than four times a number is the same as one less than twice the number. find the number?

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.