2 years ago

Help with number 2 please

Mathematics

1 answer:

lord [1]2 years ago

3 0

Answer:

Step-by-step explanation:

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Find the equation of the line with an y-intercept of -3 and an x-intercept of -4.5

Naily [24]

how am i supposed to answer this?

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2 years ago

HELP ON A TIMER WHAT IS THE x-intercept of the graph?

katen-ka-za [31]

It is 6 just look at the x

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2 years ago

b. Find a 99% confidence interval for mean age of ICU patients using the facts that, in the sample, the mean is 57.55 years and

rjkz [21]

Answer:

99% of confidence intervals for mean age of ICU patients

(53.8920 , 61.2079)

Step-by-step explanation:

Explanation:-

Given sample mean $x^{-} = 57.55$

Given standard error is determined by

S.E = $\frac{S.D}{\sqrt{n} }$

Given data standard error = 1.42

99% of confidence intervals for mean is determined by

$(x^{-} - Z_{0.01} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.01} \frac{S.D}{\sqrt{n} } )$

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.01}{2} } = Z_{0.05} = 2.576$

$(x^{-} - 2.576 S.E , x^{-} + 2.576 S.E)$

$(57.55 - 2.576X 1.42 , 57.55+ 2.576 X1.42)$

(53.8920 , 61.2079)

Conclusion:-

99% of confidence intervals for mean is determined by

(53.8920 , 61.2079)

5 0

3 years ago

3. Penny's family decided to go to the Splash Park.

Anestetic [448]

Answer:

21.25

Step-by-step explanation:

because 85$ divided by the 4 tickets is 21.25

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3 years ago

Brian invests £990 into his bank account. He receives 2% per year simple interest. How much

nata0808 [166]

$~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \£990\\ r=rate\to 2\%\to \frac{2}{100}\dotfill &0.02\\ t=years\dotfill &4 \end{cases} \\\\\\ A=990[1+(0.02)(4)]\implies A=990(1.02)(4)\implies A=4039.2$

4 0

2 years ago