Chang Li has pet cockroaches that multiply at the same rate every week.
The first week he had 5, the next week he had 10, the second week he had 20, and the fourth week he had 80. How many did he have on week 3? Choose the correct choice: A) 30 B) 25 C) 40 D) 60 E) 50
The answer is 40) 40, because the cockroaches are doubling in size every week- half of 80 is 40, and 20 doubled is 40.
<result>C</result>
Chang Li has pet cockroaches that multiply at the same rate every week.
The first week he had 5, the next week he had 10, the second week he had 20, and the fourth week he had 80. How many did he have on week 3?