The side length of a square whose are is 256ft2

The value √10 and √15 are plotted on the number line

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Will mark brainliest for correct answer! i have been on this problem for an hour and can't find the answer. i'm begging here! incase you cant read the instructions in the picture because of too much or too little lighting: note: enter your answer and show all the steps that you use to solve this problem in the space provided.write a list of steps that are needed to find the measure of b. provide all steps as clear as possible, !