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3 years ago

HELP NEEDED!!!!!!

2 answers:

Alex3 years ago

7 0

1. 10:37 - 10 because 27 + some black horses (10) is 37 and “ what is the ratio of black horses to all horses “ is all horses which is 37 ( the total # of horses )
2. 40/70 I don’t think this is right but there it goes

Contact [7]3 years ago

3 0

1. 10:37 and idk the second one

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A coin is tossed and a single die is rolled. What is the probability that the coin shows heads and the die shows a 3 or a 4?

lys-0071 [83]

Answer:

1/6

Step-by-step explanation:

landing on heads is a 1/2% and landing on a 3 or 4 is a 1/3 then multiply together

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4 years ago

If your cellphone bill was $67.82 and there is a 7.5% late fee, how much will your bill be?

Allisa [31]

Answer:

72.91

Step-by-step explanation:

100% is 67.82

1% is 67.82/100 = 0.6782

100%+7.5%= 107.5%

so, multiply!

0.6782 x 107.5 = 72.9065

round it up to 72.91

6 0

4 years ago

Read 2 more answers

Suppose we are interested in analyzing the weights of NFL players. We know that on average, NFL players weigh 247 pounds with a

Diano4ka-milaya [45]

Answer:

a) The standard error would be of 8.58 pounds.

b) The margin of error is 14.11 pounds.

c) The 90% confidence interval for the population mean is between 232.89 pounds and 261.11 pounds

Step-by-step explanation:

a.What is the standard error?

The standard error is

$s = \frac{\sigma}{\sqrt{n}}$

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

$s = \frac{47}{\sqrt{30}} = 8.58$

The standard error would be of 8.58 pounds.

b.What is the margin of error at 90% confidence?

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

$\alpha = \frac{1-0.9}{2} = 0.05$

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 $1-0.05 = 0.95$ , so $z = 1.645$

Now, find the margin of error M as such

$M = z*s = 1.645*8.58 = 14.11$

The margin of error is 14.11 pounds.

c. Using my sample of 30, what would be the 90% confidence interval for the population mean?

Lower bound: Sample mean subtracted by the margin of error.

247 - 14.11 = 232.89 pounds

Upper bound

247 + 14.11 = 261.11 pounds

The 90% confidence interval for the population mean is between 232.89 pounds and 261.11 pounds

4 0

3 years ago

in a survey of 100 cars,47 were white,23 were blue and 30 were red.express each of these numbers as a percentage of the total.

Shalnov [3]

Answer:

white- 47% Blue-23% Red- 30%

Step-by-step explanation:

White cars- (47/100)*100= 47%

Blue cars- (23/100)*100=23%

Red cars- (30/100)*100=30%

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4 years ago

Read 2 more answers

What is the value of x?

timofeeve [1]

9514 1404 393

Answer:

x = 3

Step-by-step explanation:

It is convenient to remember the ratios of side lengths of these "special triangles."

The side ratios of ΔABC are 1 : 1 : √2, so BC = AC/√2 = 6.

The side ratios of ΔBCD are 1 : √3 : 2, so BD = BC/2 = 6/2 = 3.

The value of x is 3.

6 0

3 years ago