The largest doll is 12 inches tall. the height of each of the other dolls is 7/10 the height of the next larger doll. write an expression for the height of the smallest doll. what is the height of the smallest doll?

To solve this problem you must apply the proccedure shown below:

 1. You have that the largest doll is 12 inches tall. The height of each of the other dolls is 7/10 the height of the next larger doll. Therefore, you have:

 We don't know the number of dolls, so:

 x=12(7/10)^(n-1)

 Where x is the height of the doll and n is the number of the doll

 The answer is: x=12(7/10)^(n-1)