4 years ago

Write the equation of the graph

Mathematics

2 answers:

Pachacha [2.7K]4 years ago

5 0

Y=7 it is a zero graph

kirza4 [7]4 years ago

3 0

Equation is Y=7 because it intersects the y-axis

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a 23 gram sample of a substance thats a by-product of fireworks has a K-value of .13. whats the substances half life in days

nata0808 [166]

Given:
Initial mass, m₀ = 23 g
Decay constant, k = 0.13

Exponential decay obeys the equation
$m(t)=m_{0} e^{-kt}$
where t = time, days

For half life, the mass is m = m₀/2.
Therefore
$e^{-0.13t} = \frac{1}{2} \\ -0.13t = ln(0.5)\\t= \frac{ln(0.5)}{-0.13} =5.33$

Answer: The half life is 5.33 days

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