In a normal distribution, what percentage of scores fall between –1 and +1 standard deviation units of the mean?

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

Need an artist designed a badge for a school club. figure abcd on the coordinate grid below shows the shape of the badge: the badge is enlarged and plotted on the coordinate grid as figure jklm with point j located at (2, -2) and point m is located at (5, 4). which of these could be the coordinates for point l? a. (2, 4) b. (8, 4) c. (5, 1) d. (5, 7)

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.