3 years ago

Write the polar coordinates (3, π) in rectangular form.

1 answer:

6 0

$\bf (\stackrel{\stackrel{r}{\downarrow }}{3}~~,~~\stackrel{\stackrel{\theta }{\downarrow }}{\pi })~~\begin{cases}x=rcos(\theta )\\y=rsin(\pi )\end{cases}\implies [3cos(\pi )~~,~~3sin(\pi )]\\[2em][3(-1)~~,~~3(0)]\implies \boxed{(-3,0)}$

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Answer:

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Step-by-step explanation:

A function $A_{t}=A_{0}e^{-0.0077x}$ models the amount of a radioactive material.

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If $A_{t}=432$ pound and $A_{0}=800$ pound, then we have to calculate the time for decay.

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x = $\frac{0.616186}{0.0077}$

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