Answer:
10 km
Step-by-step explanation:
<em>Distance = 5 cm</em>
<em>4 cm = 8 km</em>
<em>In km, how far apart is school and home?</em>
Cross Multiply
· ![\frac{5cm}{1}](https://tex.z-dn.net/?f=%5Cfrac%7B5cm%7D%7B1%7D)
Cancel centimeters
![\frac{40(km)(cm)}{4cm}](https://tex.z-dn.net/?f=%5Cfrac%7B40%28km%29%28cm%29%7D%7B4cm%7D)
Divide
= ![\frac{40km}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B40km%7D%7B4%7D)
= 10 km
Answer:
C
Step-by-step explanation:
Since it is greater than or equal to, the graph line is a solid line.
Then, since we know that it is greater than, we know that we can shade above the graph line.
To check this, all you have to do is choose a random point in the shaded region and plug it in the equation. If it checks out, it is correct.
Answer:
She has lived
.
Step-by-step explanation:
Given : Sara has lived 18.0 years.
To find : How many seconds has she lived?
Solution :
Using conversions,
1 year = 365.24 days
1 day = 24 hours
1 hour = 60 minutes
1 minute = 60 seconds
Converting 18 years into seconds,
![18 \text{years} = 18\times 365.24\times 24\times 60\times 60\ \text{seconds}](https://tex.z-dn.net/?f=18%20%5Ctext%7Byears%7D%20%3D%2018%5Ctimes%20365.24%5Ctimes%2024%5Ctimes%2060%5Ctimes%2060%5C%20%5Ctext%7Bseconds%7D)
![18 \text{years} =568021248\ \text{seconds}](https://tex.z-dn.net/?f=18%20%5Ctext%7Byears%7D%20%3D568021248%5C%20%5Ctext%7Bseconds%7D)
In scientific notation,
![18 \text{years} =5.68021248\times 10^8\ \text{seconds}](https://tex.z-dn.net/?f=18%20%5Ctext%7Byears%7D%20%3D5.68021248%5Ctimes%2010%5E8%5C%20%5Ctext%7Bseconds%7D)
Therefore, she has lived
.