# Question #0a990

##### 1 Answer

#### Answer:

The answer is **B)**

#### Explanation:

Scientific notation uses this format to express numbers

*mantissa*;

So, in your case, you need to select a mantissa that's bigger than or equal to 1, but smaller than 10.

If you look at the, you can "push" the decimal one unit to the right to see what the exponent, or *negative*.

And there you have it. The mantissa will be