Question

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?

Answer 1

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)