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3 years ago

Tyra has 1223 cups of sugar. If r is the amount of sugar called for in one batch of cookies,

Mathematics

1 answer:

miss Akunina [59]3 years ago

5 0

Answer:

1223 ÷ 23 = 53.1739130435

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Martina filled a 100mL container Simone filled a 1.2 liter container how much more water does Simone have than Martina

fomenos

Answer:

divide 100 ml and 1.2 liter

Step-by-step explanation:

You will get the answer in percent

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3 years ago

Read 2 more answers

On the three quizzes so far, Eric has scored 75, 92, and 83. What must he score on the fourth

AVprozaik [17]

He can make a 70 or higher to keep a B avg.

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3 years ago

A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 3%

andre [41]

Answer: a) 683 b) 1067

Step-by-step explanation:

The confidence interval for population proportion is given by :-

$p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

a) Given : Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}}=\pm1.96$

Margin of error : $E=0.03$

Formula to calculate the sample size needed for interval estimate of population proportion :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.2(0.8)(\dfrac{1.96}{0.03})^2=682.951111111\approx683$

Hence, the required sample size would be 683 .

b) If no estimate of the sample proportion is available then the formula to calculate sample size will be :-

$n=0.25(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.96}{0.03})^2=1067.11111111\approx1067$

Hence, the required sample size would be 1067 .

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3 years ago

Add.<br> (8a + 2b - 9) + (-11a - 5b + 4)

Valentin [98]

Answer:

(-3a -3b -5)

Step-by-step explanation:

So you have to add numbers with same valuables

8a+(-11a) Answer: -3a
2b+(-5b) Answer: -3b
-9+4 Answer: -5

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3 years ago

The equation of the graphed line is 2x-3y=12 what is the x-intercept of the graph ?

Natali [406]

Answer:

(6,0)

Step-by-step explanation:

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3 years ago