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2 years ago

A car moving at a constant speed travels 78 feet in 2 seconds. How many feet will it travel in 60 seconds?

Mathematics

1 answer:

alexgriva [62]2 years ago

4 0

Answer:

2340 ft.

Step-by-step explanation:

Step 1:

78 : 2 Ratio

Step 2:

39 : 1 Convert

Step 3:

39 × 60 Multiply

Answer:

2340 ft.

Hope This Helps :)

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I think it is 0.149x10^-4

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2 years ago

Eli is following this recipe to bake bread rolls. He uses 600ml of water. How much of the others ingredients does he use? 600g f

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Answer:

720 grams of flour.

10.8 grams of salt.

14.4 grams of yeast

36 ml of oil.

Step-by-step explanation:

The recipe is:

600g flour

9g salt

12g yeast

30ml oil

500ml water

Now we use 600ml of water.

We can take the quotient between the amount of water we use and the amount of water in the recipe, this is:

600ml/500ml = 1.2

Then the ratio between the quantities we need to use and the quantities un the recipe should be always 1.2

Or the quantities that Eli needs to use will be 1.2 times the ones shown in the recipe.

Then she needs to use:

1.2*600g flour = 720 grams of flour.

1.2*9g salt = 10.8 grams of salt.

1.2*12g yeast = 14.4 grams of yeast

1.2*30ml oil = 36 ml of oil.

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2 years ago

What is the lateral surface area?

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The lateral surface area is the lateral surface area

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2 years ago

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Answer:

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Step-by-step explanation:

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1 year ago

NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6.Suppose a sample of

olganol [36]

Answer:

The 85% confidence interval would be given by (0.261;0.319)

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

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".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Data given

$X=150$ number of people who pass

$n=518$ random sample taken

$\hat p=\frac{150}{518}=0.290$ estimated proportion of people who black put at G forces greater then 6

$p$ true population proportion of people who black put at G forces greater then 6

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 85% of confidence, our significance level would be given by $\alpha=1-0.85=0.15$ and $\alpha/2 =0.075$ . And the critical value would be given by: