3 years ago

OK i'm still very tired

Mathematics

2 answers:

sattari [20]3 years ago

8 0

Same, I had 4 hours and a half of sleep now I have to do a final for math. Ughh

ZanzabumX [31]3 years ago

5 0

Go to sleep, maybe it helps

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Exponential and growth. Pls help me T^T

sergiy2304 [10]

Answer: r = -0.14

<u>Step-by-step explanation:</u>

$K=K_o\cdot e^{rn}\quad \text{where;}\\\bullet K\ \text{is the final amount of Kristinite}\\\bullet K_o\ \text{is the initial amount of Kristinite}\\\bullet r\ \text{is the rate of decay}\\\bullet n\ \text{is the number of seconds the decay has occurred}\\\\\\\text{Given:}\\\\K: \dfrac{1}{2}K_o\\\\r: unknown\\\\n: 2\\\\\\K=K_o\cdot e^{rn}\\\\\\\dfrac{1}{2}K_o=K_o\cdot e^{r(5)}\\\\\\\dfrac{1}{2}=e^{5r}\\\\\\ln\dfrac{1}{2}=5r\\\\\\\dfrac{ln\dfrac{1}{2}}{5}=r\\\\\\-0.14=r\\$