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hram777 [196]
3 years ago
8

Help help please please

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
5 0

Answer:

28 cm

Step-by-step explanation:

let the length of longest piece of Ribbon=x

\frac{12}{3} =\frac{x}{7} \\x=7 \times 4=28\\

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Nate's car will go 20 miles on 5 gallons. Nate wants to know how fuel efficient the car is. Please help by computing the ratio.
nadezda [96]

Answer:

4 miles per gallon of fuel.

Step-by-step explanation:

The fuel efficiency of a car is given by the ratio of distance traveled by car to the volume of fuel used.

Now, given that Nate's car will go 20 miles on 5 gallons of fuel.

Therefore, the fuel efficiency of Nate's car will be given by the ratio  

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3 years ago
A square lot has sides of 39.875 m<br> Which is the best estimate for the perimeter of the lot?
Lana71 [14]

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4 years ago
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3 years ago
If the inspection division of a county weights and measures department wants to estimate the mean amount of soft-drink fill in 2
nikklg [1K]

Answer:

n=97

Step-by-step explanation:

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Assuming the X follows a normal distribution

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The next step would be find the value of \z_{\alpha/2}, \alpha=1-0.95=.05 and \alpha/2=0.025

Using the normal standard table, excel or a calculator we see that:

z_{\alpha/2}=1.96

If we solve for n from formula (1) we got:

\sqrt{n}=\frac{z_{\alpha/2} \sigma}{Me}

n=(\frac{z_{\alpha/2} \sigma}{Me})^2

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n=(\frac{1.96(0.05)}{0.01})^2 =96.04

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4 years ago
a number cube is rolled and a coin is tossed. What is the probability of rolling a 5 and tossing tails
kodGreya [7K]

rolling a 5 is a 1/6 probability

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 doing both is a 1/6 * 1/2 = 1/12 probability

8 0
3 years ago
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