At Fito's garden, AND tiles are arranged in a row. The initial color of each tile is represented by a string S of length N. The i-th tile from the left is painted black if the i-th character of S is 0 and painted white if that character is 1. Fito wants to repaint some of the tiles black or white so that any two adjacent tiles have different colors. What is the minimum amount of tiles that he need to repaint in order to satisfy this condition

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches. approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year? show your work and explain your reasoning in the space provided below.