Answer:
![c(t) = 120 [0.7]^{t}](https://tex.z-dn.net/?f=c%28t%29%20%3D%20120%20%5B0.7%5D%5E%7Bt%7D%20)
Step-by-step explanation:
At the moment a certain medicine is injected, its concentration in the bloodstream is 120 milligrams per liter.
From that moment forward, the medicine's concentration drops by 30% each hour.
Therefore, the medicine concentration c(t) in mg/liters after t hours will be modeled as
![c(t) = c(0) [1 - \frac{30}{100}]^{t}](https://tex.z-dn.net/?f=c%28t%29%20%3D%20c%280%29%20%5B1%20-%20%5Cfrac%7B30%7D%7B100%7D%5D%5E%7Bt%7D%20)
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. (Answer)
[] The fractions are

[] I see that 21 is a multiple of 7, so this one will be simple to solve.
-> 21 / 7 = 3, so we can do the following:

[] Now they have a common denominator of <u>21</u>
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
Weight of a puppy in a local pet store = 72 ounces
Given ,
1 pound = 12 ounces
Then , 72 ounces will be equal to :
= 72 ÷ 12
= 6
Therefore , the weight of the puppy is 6 pounds .
145 because I added them and I did the correct answer
Answer:
The area is multiplied by 4
Step-by-step explanation:
The area of a circle is directly proportional to its square radius so if the radius is increased by x, the area will be increased by x ^ 2