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3 years ago

How many meatballs are required for a party of 25 adults and 7 children ?

2 answers:

8 0

M=4(25)+2(7) Just plug in the numbers and solve for the number of meatballs needed. <u>114 meatballs</u> for your party, of course you might want to plan for those that have more than their share or show up uninvited to crash the party.

Dafna11 [192]3 years ago

3 0

I got 114 meat balls
i multiplied 25x4 and 7x2 and added the 2
so 114

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Suppose a researcher is estimating the proportion of trees showing signs of disease in a local forest. They randomly sample 150

Serhud [2]

Answer:

$0.167 - 1.96 \sqrt{\frac{0.167(1-0.167)}{150}}=0.107$

$0.167 + 1.96 \sqrt{\frac{0.167(1-0.167)}{150}}=0.227$

And the 95% confidence interval would be given (0.107;0.227).

Step-by-step explanation:

Information given

$X= 25$ number of trees with signs of disease

$n= 150$ the sample selected

$\hat p=\frac{25}{150}= 0.167$ the proportion of trees with signs of disease

The confidence interval for the true proportion would be given by this formula

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

For the 95% confidence interval the significance is $\alpha=1-0.95=0.05$ and $\alpha/2=0.025$ , and the critical value would be

$z_{\alpha/2}=1.96$

And replacing we got:

$0.167 - 1.96 \sqrt{\frac{0.167(1-0.167)}{150}}=0.107$

$0.167 + 1.96 \sqrt{\frac{0.167(1-0.167)}{150}}=0.227$

And the 95% confidence interval would be given (0.107;0.227).

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2 years ago

A mail truck traveled 82 miles in 4 1/2 hours. The distance is the product of the rate and the time. To the nearest tenth, what

jeyben [28]

Answer:

= 18.2 miles per hour

Step-by-step explanation:

Speed = distance / time

=82 miles / 4.5 hours

=18.22222222 miles per hour

Rounding

= 18.2 miles per hour

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Answer:

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