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3 years ago

5

a car can travel 476 miles in 14 gallons of gas write an equation relating the distance to the number of gallons how many gallon

s does this car take to travel 578 miles

1 answer:

shutvik [7]3 years ago

5 0

476/14 is 34
You are very welcome

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The Highway Safety Department wants to study the driving habits of individuals. A sample of 40 cars traveling on a particular st

Ipatiy [6.2K]

Answer:

We need a sample size of at least 101

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What sample size is needed to estimate the true average speed to within 2 mph at 99% confidence?

We need a sample of at least n.

n is found when M = 2. So

$M = z*\frac{\sigma}{\sqrt{n}}$

$2 = 2.575*\frac{7.8}{\sqrt{n}}$

$2\sqrt{n} = 2.575*7.8$

$\sqrt{n} = \frac{2.575*7.8}{2}$

$(\sqrt{n})^{2} = (\frac{2.575*7.8}{2})^{2}$

$n = 100.85$

Rounding up

We need a sample size of at least 101

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3 years ago

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Scott is four more than double the age of Todd. Scott is 56. What is Todd's age?

SSSSS [86.1K]

Answer: 26 years old

Step-by-step explanation:

Since Scott is four more than double the age of Todd, start by taking away four from Scott's age.

56-4=52

Then take half of that because that would be double of Todd's age

52/2=26

Todd is 26 years old.

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2 years ago

If you add 15 calls and multiple them by the total of 67 keeps and there is only one 1 Jeep subtract that by 56 and add 100 divi

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Answer:

IT would give you a decimal whis is 966.66666666667

Step-by-step explanation:

15*67+1-56+100/6

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2 years ago

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A) Write 84 as the product of prime factors.<br> Write the prime factors in ascending order.

timofeeve [1]

84 = 2 x 2 x 3 x 7 which can also be written 2² x 3 x 7.

Ascending order means to keep the factors in order from least to greatest.

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3 years ago

Which situation can be represented by Y= 12x - 4?

andrey2020 [161]

Answer:

D. The number of eggs , y, in x, dozen eggs for sale after 4 dozen eggs are sold

Step-by-step explanation:

The correct answer is D

The number of eggs , y, in x, dozen eggs for sale after 4 dozen eggs are sold.

Hope this helps.

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