# Type your answer in decimal form. Do not round. 7 days =________a0 hours?

Apr 20, 2018

It depend on the definition of day, solar day or stellar day

#### Explanation:

Solar day:
$1$ $\text{day}$ $= 24 h$
$7$ $\text{day}$ =$7 \cdot 24 h = 168 h$

Stellar day:
$1$ $\text{day}$ $=$ $23$ $\text{hours}$ $56$ $\text{minutes}$ $\text{and}$ $4.1$ $\text{seconds}$ $=$

$= 23 + \frac{56}{60} + \frac{4.1}{3600} h = 23.934472222 h$

$7$ $\text{day}$ $= 7 \cdot 23.934472222 h = 167.541305556 h$

Since you are are asking for decimal form, I suppose you defined the day as stellar day. If you are interested click here.

Apr 20, 2018

$7 \textcolor{w h i t e}{.} \mathrm{da} y s$

$1 \textcolor{w h i t e}{.} \mathrm{da} y = 24 \textcolor{w h i t e}{.} h o u r s$

So, we want the units of $\mathrm{da} y s$ to cancel out so we're left with $h o u r s$:

$7 \textcolor{w h i t e}{.} \cancel{\mathrm{da} y s} \cdot \frac{24 \textcolor{w h i t e}{.} h o u r s}{1 \textcolor{w h i t e}{.} \cancel{\mathrm{da} y}}$

$168 \textcolor{w h i t e}{.} h o u r s$