Which is the smallest set of real number that contains the the value "Square root of 50"

Angela took a general public aptitude test and scored in the 88th percentile for aptitude in accounting. what percentage of the scores were at or below her score?

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?