You plant a tree that is 36 inches tall. after one year, the tree is 43 inches tall. which expression describes the percent of increase in the tree's height?

3643×100

43−3643

43−3636×100

43−3643×100

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236