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1 year ago

PLs help

Mathematics

1 answer:

Allisa [31]1 year ago

8 0

hope this helps :)

Answers:

1a: I can predict that Flower Garden and Butterlfies and Ladybugs are the two more likely to be chosen, over April Showers.

1b: These percentages I got can prove my theory of that the probability of choosing April Flowers is much lower than the two other options.

Flower Garden: 35/78 ≈ 45%

April Showers: 16/78 ≈ 21%

Butterflies and Ladybugs: 27/78 ≈ 34%

2a: What you should NOT do is conclude which two will be picked.

2b: Although you can predict, based on percentages or other things. You cannot make such a conclusion with the choice being random.

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A football field has the shape of a rectangle with dimensions of 300 feet long and 160 feet wide. If a fan was to run diagonally

OLga [1]

Answer: 340

Explanation:

In order to find the length of the diagonal of a rectangle you need to cut the rectangle in diagonal then you have 2 right triangle:

We can take one right triangle to work with:

We can use Pythagorean’s theorem to find the hypotenuse of the right triangle (also the diagonal of the rectangle):

a^2 + b^2 = c^2
300^2 + 160^2 = c^2
90000 + 25600 = c^2
115600 = c^2
Sqrt 115600 = c
340 = c

Where c is the hypotenuse of the right triangle and also the diagonal of the rectangle

3 0

2 years ago

Read 2 more answers

A researcher studied the radioactivity of asbestos. She sampled 81 boards of asbestos, and found a sample mean of 193.2 bips, an

Ksivusya [100]

Answer:

a) Confidence interval is (182.86,203.54).

b) (i) Yes, 200 bips is a true mean as it lie in the interval.

(ii) No, 210 bips is not a true mean as it doesn't lie in the interval.

Step-by-step explanation:

Given : A researcher studied the radioactivity of asbestos. She sampled 81 boards of asbestos, and found a sample mean of 193.2 bips, and a sample standard deviation of 49.5 bips.

To find : (a) Obtain the 94% confidence interval for the mean radioactivity. (b) (i) According the interval that you got, is 200 bips a plausible value for the true mean? (ii) What about 210 bips?

Solution :

a) The confidence interval formula is given by,

$\bar{x}-z\times \frac{\sigma}{\sqrt{n}}$

We have given,

The sample mean $\bar{x}=193.2$ bips

s is the standard deviation $\sigma=49.5$ bips

n is the number of sample n=81

z is the score value, at 94% z=1.88

Substitute all the values in the formula,

$193.2-1.88\times \frac{49.5}{\sqrt{81}}$

$193.2-1.88\times 5.5$

$193.2-10.34$

$182.86$

Confidence interval is (182.86,203.54).

b) (i) According the interval $182.86$

200 bips a plausible value for the true mean as it lies in the interval.

(ii) 210 bips not lie in the confidence interval so it is not a true mean.

3 0

3 years ago

Solve for p.

jasenka [17]

Answer: When you have two mutually exclusive events, to find the probability of one or another, you add the probabilities.

65+7=72

Final answer: B

Step-by-step explanation:

7 0

1 year ago

the mean of a group of students in 60 . if their marks 85 ,65,36 ,48 , X ,75 ,39,72 then find the value of x

miss Akunina [59]

Answer: 60

Step-by-step explanation:

Find the total number of students.

In this case, there are 8 total students. Multiply 60 * 8 = 480

Add all the numbers up.

85 + 65 + 36 + 48 + 75 + 39 + 72 = 420

480 - 420 = 60

x = 60

4 0

2 years ago

Please help find the value of t?

Gwar [14]

Step-by-step explanation:

volume=8448m²

volume=l×b×h

=11m×8m×t

=88m²×t

therefore, 88m²×t=8448m²

t= 8448/88

= 96

Check:-

volume= l×b×h

=11m×8m×96

=8448m³

Our answer is correct

4 0

2 years ago