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3 years ago

Plz help

Mathematics

1 answer:

tankabanditka [31]3 years ago

5 0

Answer:

Because if it is converted to percentages it would be easier to see.

-225%, -250%, -275%.

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2.5% of what is 2.21?

Varvara68 [4.7K]

To get the answer do this:

2.5% of what is 2.21

2.5%x = 2.21

2.5/100x = 2.21

0.025x = 2.21

divide both sides by 0.025

0.025x/0.025 = 2.21/0.025

x = 88.4
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8 0

3 years ago

Read 2 more answers

Each individual in a biological population is assumed to give

lbvjy [14]

Answer:

Please see attachment

Step-by-step explanation:

Please see attachment

8 0

3 years ago

Peter wants to add a room to his house using a ratio of 9 to 4 for its dimensions. He will make the length of the room 17 feet.

enyata [817]

Answer:

The width of the room to nearest foot $\approx$ 8 feet

Step-by-step explanation:

Ratio of length to width of the room Peter wants to add to his house = 9:4

Given length of the room = 17 feet

To find the width of the room.

Solution:

From the given data we know that the length and width of the room bear a common ratio which is 9:4

Let width of the room in feet be = $w$

Thus, the ratio can be given as:

⇒ $\frac{Length}{Width}=\frac{9}{4}$

Plugging in length of room in the equation = 17 feet.

Solving for $w$

⇒ $\frac{17}{w}=\frac{9}{4}$

Multiplying both sides by 4.

⇒ $4\times\frac{17}{Width}=\frac{9}{4}\times4$

⇒ $\frac{68}{w}=9$

Multiplying both sides by $w$

⇒ $w\times\frac{68}{w}=9\times w$

⇒ $68=9w$

Dividing both sides by 9.

⇒ $\frac{68}{9}=\frac{9w}{9}$

∴ $w=7.55\approx 8$

Thus, the width of the room to nearest foot $\approx$ 8 feet

4 0

4 years ago

For the statement below, write the claim as a mathematical statement. State the null and alternative hypotheses and identify wh

vfiekz [6]

The question is not complete, so i have attached it.

Answer:

A) Option B: μ ≤ 19,000

B) Option C:

H0: μ ≤ 19,000

Ha: μ > 19,000

C) Option D: The null hypothesis H0: μ ≤ 19,000 is the claim

Step-by-step explanation:

A) From the question, we are told that an amusement park claims that the mean daily attendence at the park is at most 19,000 people.

Now, since it's at most 19000 people, it means that they are either 19000 or less. So the claim is;

μ ≤ 19,000 which is option B

B) Now, the claim is usually the null hypothesis. Thus, the null hypothesis is;

H0: μ ≤ 19,000

While the alternative hypothesis which states the opposite of the claim is;

Ha: μ > 19,000

So, option C is the correct answer

C) The claim is μ ≤ 19,000

Now, this also happens to be the null hypothesis.

Thus, the null hypothesis H0: μ ≤ 19,000 is the claim.

So option D is correct.

6 0

4 years ago

At a school with 100 students, 33 were taking Arabic, 39 Bulgarian, and 40 Chinese. 14 students take only Arabic, 19 take on

barxatty [35]

Answer:

6 students are taking all three

20 students are taking none.

Step-by-step explanation:

Please check image attached.

From the total of 33 that are taking Arabic, 14 only take Arabic and 13 take Arabic and Bulgarian (b + d), so the students that take only Arabic and Chinese together is:

a = 33 - 14 - 13 = 6

From the total of 39 that are taking Bulgarian, 19 only take Bulgarian and 13 take Arabic and Bulgarian, so the students that take only Bulgarian and Chinese together is:

c = 39 - 19 - 13 = 7

Now, from the total of 40 that are taking Chinese, 21 only take Chinese, 6 take only Arabic and Chinese and 7 take only Bulgarian and Chinese, so the number of students that take all three languages is:

d = 40 - 21 - 6 - 7 = 6 students

The number of students that take any language is 14 + 19 + 21 + 6 + 7 + 13 = 80 students, so 100 - 80 = 20 students take none of the three languages

4 0

4 years ago