# Calculate the answer. How would you express it in scientific notation? #(1,632) (4.0 xx 10^4)#?

##### 1 Answer

Sep 4, 2016

#### Explanation:

Here are the three rules you need.

- All
#color (red)("non-zero digits")# **are significant**. #color(red)("Trailing zeroes in the decimal portion")# of a number**are significant**.- In
**multiplication and division**,#color(red)("you round the answer to have"#

#color(red)("the same number of significant digits as the number with the")#

#color(red)("fewest significant figures")# .

You used a period as a decimal separator in 4.0, so I assume you are using the comma as a thousands separator in 1,632.

**four** significant figures.

**two** significant figures.

The answer can have only **two** significant figures.

∴