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3 years ago

6

An efficiency expert is doing a study of a certain fast food restaurant. She observes that a particularly clumsy waiter drops 30

% of all the hamburgers that he serves. What is the probability that he will drop exactly four of the next ten?

1 answer:

Shalnov [3]3 years ago

7 0

Answer:

Hello,

I don't know the words used for that binominal exercice.

Step-by-step explanation:

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Compound interest of $1000 is invested at 10% compounded continuously, the future value s at any time t in years is given by s=1

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Answer: 6.93 years

Step-by-step explanation:

Given

Rate of interest is $r=10\%$

Future value is given by $s=1000e^{0.1t}$

For the investment to double itself, i.e. $s=2000$

$\Rightarrow 2000=1000e^{0.1t}\\\Rightarrow 2=e^{0.1t}\\\\\text{Taking log both sides}\\\\\Rightarrow \ln 2=0.1t\\\\\Rightarrow t=\dfrac{\ln 2}{0.1}\\\\\Rightarrow t=6.93\ \text{years}$

It takes around 6.93 years to double the investment.

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