Question

A culture of 2.4X10^11 bacteria is in a Petri dish A. A culture of 8X10^9 bacteria is in Petri dish B. How many times greater is the number of bacteria in Petri dish A than patri dish B. Enter your answer in standard notation in the box.

Answer 1

A culture of 2.4 × 10^11 bacteria is in a Petri dish A

A culture of 8 × 10^9 bacteria is in Petri dish B

Number of times number of bacteria in Petri dish A is greater than that number in Petri dish B:

`(Number of bacteria in Petri dish A)/(Number of bacteria in Petri dish B) = (2.4 * 10^11)/(8 * 10^9)`

Divide 2.4 by 8 to give 0.3

Divide 10^11 by 10^9 to give 10^(11-9) = 10^2

The answer is 0.3 × 10²