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aleksandrvk [35]
3 years ago
12

What is another way to represent 4 over 5 is it 4times 5

Mathematics
1 answer:
damaskus [11]3 years ago
5 0

Answer:

4/5

Step-by-step explanation:

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Find the cost of flooring a square shaped room of side 10m at a rate of Rs.50 per square meter.
Ierofanga [76]
<h3>Explanation:</h3>

We have to find the area of the square shaped room.

<h3>Given:</h3>

Side of the square shaped room = 10 m

The cost of flooring a square metre is Rs. 50

<h3>To Find:</h3>

The cost of flooring a square shaped room.

<h3>Formula:</h3>

Area of square = Side × Side

<h3>Solution:</h3>

Area of the square = 10 × 10 = 100 sq.m

1 sq.m = Rs. 50

100 sq.m = 50(100) = Rs. 5,000

<h2>Answer:</h2>

The cost of flooring a square shaped room of side 10 m is <u>Rs. 5,000</u><u>.</u>

6 0
3 years ago
g A sample of 3 items is chosen at random from a box containing 20 items, out of which 4 are defective. Let X be the number of d
professor190 [17]

Answer:

The variance and standard deviation of <em>X</em> are 0.48 and 0.693 respectively.

The variance and standard deviation of (20 - <em>X</em>) are 0.48 and 0.693 respectively.

Step-by-step explanation:

The variable <em>X</em> is defined as, <em>X</em> = number of defective items in the sample.

In a sample of 20 items there are 4 defective items.

The probability of selecting a defective item is:

P (X)=\frac{4}{20}=0.20

A random sample of <em>n</em> = 3 items are selected at random.

The random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> = 3 and <em>p </em>= 0.20.

The variance of a Binomial distribution is:

V(X)=np(1-p)

Compute the variance of <em>X</em> as follows:

V(X)=np(1-p)=3\times0.20\times(1-0.20)=0.48

Compute the standard deviation (σ (X)) as follows:

\sigma (X)=\sqrt{V(X)}=\sqrt{0.48}=0.693

Thus, the variance and standard deviation of <em>X</em> are 0.48 and 0.693 respectively.

Now compute the variance of (20 - X) as follows:

V(20-X)=V(20)+V(X)-2Cov(20,X)=0+0.48-0=0.48

Compute the standard deviation of (20 - X) as follows:

\sigma (20-X)=\sqrt{V(20-X)} =\sqrt{0.48}0.693

Thus, the variance and standard deviation of (20 - <em>X</em>) are 0.48 and 0.693 respectively.

3 0
3 years ago
Katie is building a rectangular wall. The wall will be 332 bricks wide and 39 bricks tall. She has 15,000 bricks. Does she have
agasfer [191]
Katie has enough bricks because it only takes 12,948 bricks to build the wall. To get 12,948, you will multiply 332 by 39. So basically you are multiplying the width by how tall it is.
4 0
3 years ago
Read 2 more answers
A sphere has a volume of Vequals=3600 in cubedin3. Find its surface area.
Mice21 [21]
\bf \textit{volume of a sphere}\\\\&#10;V=\cfrac{4}{3}\pi r^3\qquad &#10;\begin{cases}&#10;r=radius\\&#10;------\\&#10;V=3600&#10;\end{cases}\implies 3600=\cfrac{4}{3}\pi r^3&#10;\\\\\\&#10;3600=\cfrac{4\pi r^3}{3}\implies \sqrt[3]{\cfrac{3\cdot 3600}{4\pi }}=\boxed{r}\\\\&#10;-----------------------------\\\\&#10;\textit{surface area of a sphere}\\\\&#10;S=4\pi r^2\implies S=4\pi \left(\boxed{\sqrt[3]{\cfrac{3\cdot 3600}{4\pi }}}  \right)^2

simplify away
8 0
3 years ago
Find the area of a circle
DiKsa [7]

Answer:

78.5cm^2

Step-by-step explanation:

Half your diameter to get a radius.

D = 10cm

10 divided by 2 = 5

Pi (3.14)

3.14 x 5^2

3.14 x 25 = 78.5cm^2

7 0
3 years ago
Read 2 more answers
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