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Ganezh [65]
2 years ago
15

Kalo randomly surveyed 25 students at his school and found that 19 of them have at least one sibling. Based on these data, how m

any of the 125 students at his
school would be expected to have at least one sibling?
Mathematics
2 answers:
TEA [102]2 years ago
8 0

Answer:

95 students

Step-by-step explanation:

25 students -- 19 have sibling

1 student -- (19/25)

125 students -- (19/25) * 125 = 95

Therefore, 95 students out of 125 are expected to have at least one sibling.

Thenks and mark me brainliest :))

Anika [276]2 years ago
4 0

Answer:

95

Step-by-step explanation:

Calculate the experimental probability of choosing a student who has at least one sibling:  It is 19/25, or 0.56.

If 125 students are selected, this probability applies.  Multiply 125 by 0.56:

0.56(125 students) = 95

95 students could be expected to report having at least one sibling.

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The volume of clay used to build a cylindrical pillar with a height of 9 centimeters is 324 pi cubic centimeters. The area of th
Marta_Voda [28]

Answer:

36 (Fill 3 in the blank)

Step-by-step explanation:

Given:

Volume of a cylinder = 324 π

Height = 9 cm

The formula to find the volume of a cylinder = Base area * height.

Base is a circle. So the area of a circle = πr^2

Volume of the cylindrical pillar = πr^2 h

324 π = πr^2 . 9

πr^2 = 324 π /9

πr^2 = 36 π

The area of the base = 36 π

Thank you.

7 0
3 years ago
Read 2 more answers
John borrowed $ from bank for 3 years at a rate of 10%
garik1379 [7]
<h3>Given:</h3>
  • P= $12500
  • R= 10%
  • T= 3 years
<h3>Note that:</h3>
  • P= Principal amount
  • R= Rate of interest
  • T= Time period
<h3>To find:</h3>
  • The simple interest
  • The total amount paid
<h3>Solution:</h3>

\large\boxed{Formula: I= \frac{PRT}{100}}

First, we'll have to multiply, principal amount (12500), rate (10) and time period (3).

12500×10×3

=375000

Now, we'll have to divide the amount (375000) by 100.

\frac{375000}{100}

<em>I=$3750</em>

Now, we can find the total amount paid.

\large\boxed{A=SI+P}

Let's substitute according to the formula.

A=3750+12500

<em>A=$16250</em>

<u>Therefore</u><u>,</u><u> </u><u>simple</u><u> </u><u>interest</u><u> </u><u>is</u><u> </u><u>$</u><u>3</u><u>7</u><u>5</u><u>0</u><u> </u><u>and</u><u> </u><u>$</u><u>1</u><u>6</u><u>2</u><u>5</u><u>0</u><u> </u><u>was</u><u> </u><u>paid</u><u> </u><u>in</u><u> </u><u>total</u><u>.</u>

5 0
1 year ago
Find the area of the rectangle
aksik [14]
Hope it works for you

4 0
3 years ago
Write the following quotient in the form a+bi.<br> -7i/2-7i
Helga [31]

Answer:

\large\boxed{\dfrac{49}{53}-\dfrac{14}{53}i}

Step-by-step explanation:

\text{Use}\\\\i=\sqrt{-1}\to i^2=-1\\\\(a-b)(a+b)=a^2-b^2\to(a-bi)(a+bi)=a^2+b^2\\\\\text{distributive property}\ a(b+c)=ab+ac\\---------------------\\\\\dfrac{-7i}{2-7i}=\dfrac{-7i}{2-7i}\cdot\dfrac{2+7i}{2+7i}=\dfrac{-7i(2+7i)}{2^2+7^2}=\dfrac{(-7i)(2)+(-7i)(7i)}{4+49}\\\\=\dfrac{-14i-49i^2}{53}=\dfrac{-14i-49(-1)}{53}=\dfrac{-14i+49}{53}\\\\=\dfrac{49}{53}-\dfrac{14}{53}i

8 0
3 years ago
Read 2 more answers
Put these numbers in order from least to greatest 12%, -1/2, 0, -0.22, 0.56
uysha [10]

Answer: -1/2, -0.22, 0, 12%, 0.56

Step-by-step explanation:

-1/2 is equal to -0.50, making it the number with the least value.

-0.22 is closer to 0 than -0.50, meaning it is greater then -0.50 and less than 0.

0 is between the negative and positive numbers, giving it the spot that it has.

12% is equivalent to 0.12, meaning it is more than 0, and less than 0.56, which is the greatest number.

0.56 has more value than any other number in the problem, meaning it goes last in the order.

8 0
3 years ago
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