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MulletStaton3283

MulletStaton3283

22.12.2019 •

Mathematics

Kieran's dance class starts at 4: 30and ends at 6: 15 how long was he class

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Ответ:

sanchez9211

13.01.2022

His class was 1:45 long.
1 hour and 45 minutes

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Ответ:

phanuel642

13.01.2022

13 hours 45 minutes just subtract the hours and then subtrsact the minutes. After, add them together

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Ответ:

kaileyy06

24.01.2021

t = 8588 years

Step-by-step explanation:

From the given information:

Using the formula:

$k = \dfrac{In (2)}{t_{1/2}}$

Given that:

$t_{1/2}$ = 5730 years

Then:

$k = \dfrac{In (2)}{5730}$

$k = \dfrac{0.6931472}{5730}$

k = 1.20968 × 10⁻⁴

However; the expression to find the value of x is:

$x= x_oe^{-kt}$

$4.6 \times 10^{-13} = 1.3 \times 10^{-12} \times e^{(-1.20968\times 10^{-4} \times t)}$

$\dfrac{4.6 \times 10^{-13} }{1.3 \times 10^{-12}}= e^{(-1.20968\times 10^{-4} \times t)}$

$0.353846= e^{(-1.20968\times 10^{-4} \times t)}$

(-1.20968 × 10⁻⁴ × t) = In(0.353846)

(-1.20968 × 10⁻⁴ × t) = -1.03889

$t = \dfrac{-1.03889}{-1.20968 \times 10^{-4}}$

t = 8588 years

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