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Anna [14]
3 years ago
8

What is 2/r=12/18? Chcjcjxjxkxkx

Mathematics
1 answer:
Alexeev081 [22]3 years ago
8 0

Answer: r = 3

Step-by-step explanation:

Step 1: Cross-multiply.

2r = 12/18

(2)*(18)=12*r

36=12r

Step 2: Flip the equation.

12r=36

Step 3: Divide both sides by 12.

12r/12 = 36/12

r = 3

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Answer:

This is an example of exponential decay (somewhat similar to half-life).

If it decays at 11% per hour we can calculate its half-life by this formula:

half life = [ time • ln (2) ] ÷ ln (beginning amount ÷ ending amount)

where "ln" means natural log

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Source: https://www.1728.org/halflif2.htm



Step-by-step explanation:


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