Question

A lab has two bacteria cultures. Culture A contains 8 x10^3 bacteria, and culture B contains 4 x10^6 bacteria. How do the two cultures compare in size?A Culture A contains twice as many bacteria as culture B.B Culture A contains 1/25 as many bacteria as culture B.C Culture A contains 1/2 as many bacteria as culture B.D Culture A contains 1/50 as many bacteria as culture B.

Answer 1

Given:

Culture A contains 8 x10^4 bacteria

Culture B contains 4 x10^6 bacteria

To compare between them we will divide A by B

so,

$\frac{8\times10^4}{4\times10^6}=\frac{8}{4}\cdot\frac{10^4}{10^4\cdot10^2}=\frac{2}{1}\cdot\frac{1}{10^2}=\frac{2}{100}=\frac{1}{50}$

so, the answer will be:

Culture A contains 1/50 as many bacteria as culture B.​

The answer is option D.