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3 years ago

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the function y=-2(x-3)^2+4 shows the daily profit (in hundreds of dollars) of a hot dog stand, where x is the price of a hot dog

(in dollars). Find and interpret the 0's of this function.

1 answer:

Roman55 [17]3 years ago

8 0

X intercept would mean plug in 0 for Y.
Then finding the y intercept would mean X is 0. Your answer will be 69420

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Step-by-step explanation:

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The fourth root? There is no simplifying to be done.

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Step-by-step explanation:

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A student wanted to estimate the number of chocolate chips in a commercial brand of cookie. He sampled 100 cookies and found an

m_a_m_a [10]

Answer: A. (8.4,12.6)

Step-by-step explanation:

Confidence interval $(\mu)$ is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

, where n is the sample size

$\sigma$ = Population standard deviation.

$\overline{x}$ = Sample mean

$z_{\alpha/2}$ = Two tailed z-value for significance level of $\alpha$ .

Given : Confidence level = 99% = 0.99

Significance level = $\alpha=1-0.99=0.01$

By standard normal z-value table ,

Two tailed z-value for Significance level of 0.01 :

$z_{\alpha/2}=z_{0.005}=2.576$

Also,

n=100

$\sigma= 8$

$\overline{x}=10.5$

Then, the required 99% confidence interval for the average number $(\mu)$ of chips per cookie :-

$10.5\pm (2.576)\dfrac{8}{\sqrt{100}}\\\\ =10.5\pm 2.0608\\\\=(10.5-2.0608,\ 10.5+2.0608)=(8.4392,\ 12.5608)\approx(8.4,\ 12.6)$

Hence, the 99% confidence interval for the average number of chips per cookie = (8.4,12.6)

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2 years ago