The sum of a 2-digit number and the 2-diget number formed by shifting the 2 digits is a square number. list all the 2 digit numbers that have such property

Which one ? is the answer and how to find this answer

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table

70 points ! pls 2. given the following two sets of data what is the union of the two sets and what is the intersection of the two sets. set a = {1, 2, 3, 4, 5, 6, 7, 8, 9} set b = {2, 4, 6, 8, 10, 12, 14} 3. given a regular deck of cards. describe a way of pulling cards that would create a dependent event and then one that would create an independent event. 4. what is the probability of drawing a red card and then drawing a spade without replacing the card that was drawn first?