In a shopping mall, shoppers who use a reward points card get a 10% discount on every transaction. if the average transaction is $450 for customers with these cards, and $500 for other customers, what happens to the expected value of a transaction? a. it increases by $50. b. it increases by $100. c. it decreases by $50. d. it decreases by $100. e. it decreases by $250.

The expected value of a transaction decreases from 500 to a number between 450 and 500. Since we don't know what percentage of shoppers are using this card, we cannot determine where the new expected value of a transaction will be. For example, if 50% of shoppers use the reward points, then the expected value of a transaction would be $475. 

probably a

Step-by-step explanation:

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²