1) 2m/s = 2*18/5 =7.2Km/h
2)In 3 hour, he would travel, 7.2*3 = 21.6Km.
Answer:
![n = -5](https://tex.z-dn.net/?f=n%20%3D%20-5)
Step-by-step explanation:
Given
![Digit = 0.000025](https://tex.z-dn.net/?f=Digit%20%3D%200.000025)
Required
Rewrite using scientific notation, then find n
![Digit = 0.000025](https://tex.z-dn.net/?f=Digit%20%3D%200.000025)
Express as fraction
![Digit =\frac{25}{1000000}](https://tex.z-dn.net/?f=Digit%20%3D%5Cfrac%7B25%7D%7B1000000%7D)
This can be splitted to
![Digit = 25 * 10^{-6}](https://tex.z-dn.net/?f=Digit%20%3D%2025%20%2A%2010%5E%7B-6%7D)
The first number must be between 1 and 10; hence, 25 can be expressed as 2..5 * 10
![Digit = 2.5 * 10* 10^{-6}](https://tex.z-dn.net/?f=Digit%20%3D%202.5%20%2A%2010%2A%2010%5E%7B-6%7D)
Apply law of indices
![Digit = 2.5 * 10^{1-6}](https://tex.z-dn.net/?f=Digit%20%3D%202.5%20%2A%2010%5E%7B1-6%7D)
![Digit = 2.5 * 10^{-5}](https://tex.z-dn.net/?f=Digit%20%3D%202.5%20%2A%2010%5E%7B-5%7D)
Comparing n, the given options
![n = -5](https://tex.z-dn.net/?f=n%20%3D%20-5)
Answer:
19.1
Step-by-step explanation:
27 is half of 54, so that means that the second triangle is 1/2 the size of the first, meaning all sides need to be divided by 2 in order to get the answers for each side
Answer:
7.9230
Step-by-step explanation:
Combine like terms
115 = 13x+12
103 = 13x
7.9230 = x
Hope that helps