Answer:
Third option: Rocks being broken apart
Step-by-step explanation:
Have a good day :)
For a, we have 42in/9ft. Since 12 inches are in 1 foot, we can multiply it by that to get (42in/9ft)*(1ft/12inches) = 42/108. We put the foot on the top of 1ft/12in to cancel them out. Since 2 goes into both 42 and 108, we divide it by 2/2 to get 26/54. Repeating the process again, we get 13/27
If we were to say that there are 12 inches in a foot and therefore divide 42 by 12 (to get 42 inches in feet), we'd get the same answer due to that 1 foot is equal to 12 inches and if you were to divide it by 1 foot/12 inches, since they are the same thing, you get the same answer
For c, since it may be hard to get (42/12)/9, it could just be easier to have 42/(9*12)=42/108
Answer: 10⁻⁸°⁹
<u>Step-by-step explanation:</u>
![pH=log\bigg(\dfrac{1}{[H^+]}\bigg)\\\\\text{use log expansion rules to get:}\\pH=log\ 1-log\ [H^+]\\\\8.9=0\ -\ log\ [H^+]\\\\8.9=-log\ [H^+]\\\\-8.9=log\ [H^+]\\\\\text{use log transformation rules to get the following exponential equation:}\\10^{-8.9}=[H^+]](https://tex.z-dn.net/?f=pH%3Dlog%5Cbigg%28%5Cdfrac%7B1%7D%7B%5BH%5E%2B%5D%7D%5Cbigg%29%5C%5C%5C%5C%5Ctext%7Buse%20log%20expansion%20rules%20to%20get%3A%7D%5C%5CpH%3Dlog%5C%201-log%5C%20%5BH%5E%2B%5D%5C%5C%5C%5C8.9%3D0%5C%20-%5C%20log%5C%20%5BH%5E%2B%5D%5C%5C%5C%5C8.9%3D-log%5C%20%5BH%5E%2B%5D%5C%5C%5C%5C-8.9%3Dlog%5C%20%5BH%5E%2B%5D%5C%5C%5C%5C%5Ctext%7Buse%20log%20transformation%20rules%20to%20get%20the%20following%20exponential%20equation%3A%7D%5C%5C10%5E%7B-8.9%7D%3D%5BH%5E%2B%5D)
Answer:
4 light years
Step-by-step explanation:
(2.4·10¹³ miles)/(6·10¹² miles/ly) = 0.4·10¹ ly = 4 light years
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The applicable rule of exponents is ...
(a^b)/(a^c) = a^(b-c)
Answer: the fox runs faster
Rabbit 35/h
Fox 21/1/2
so if we just add 21 again we’ll get 42/h
