A / -5 greater than or equal to 10

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Answer! if you don’t mind, can you explain

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?