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3 years ago

Explain the answer to 4 + (+9)

Mathematics

1 answer:

yaroslaw [1]3 years ago

4 0

I believe that it would be 13, unless you were trying to make the 9 negative. Hope that helps.

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A cylinder has a base area of 64π m2. Its height is equal to twice the radius. Identify the volume of the cylinder to the neares

Maurinko [17]

Answer:

3215 .36 m³ is the required volume.

Step-by-step explanation:

Base area of Cylinder = 64π m²

Height of cylinder is equal to twice the radius .

As we know that ,

★Base Area of Cylinder = πr²

where,

π is taken as 22/7 or 3.14

r is the radius of cylinder

Substitute the value we get

↝ 64 π = πr²

↝ 64 = r²

↝ √64 = r

↝ 8 = r

↝ r = 8 m

Now, it is given that height is equal to twice of radius

Therefore ,

height = 2r = 2×8 = 16 m

★Volume of Cylinder = πr²h

substitute the value we get

↝ volume of Cylinder = 3.14 × 8² × 16

↝volume of Cylinder = 3.14 × 64 × 16

↝volume of Cylinder = 3215 .36 m²

Hence, the required volume of cylinder is 3215 .36 m³.

6 0

3 years ago

Find the number of ways to listen to 4 CDs from a selection of 8 CDs.

Sati [7]

1680. 8p4, which is 8!/(8-4)!

5 0

3 years ago

Write 0.24 as a reduced fraction

iogann1982 [59]

.24 = 24/100 = 12/50 = 6/25

3 0

3 years ago

Photos and videos have become an important part of the online social experience, with more than half of Internet users posting p

klasskru [66]

Answer:

0.82

Step-by-step explanation:

Given:

A be the event that an Internet user posts photos taken by themselves.

B be the event that an Internet user posts photos taken by themselves.

P(A) = 0.47

P(A) = 0.28

P(A or B) = $P(A\cup B)$ = 0.52

To find:

Conditional probability that an Internet user posts photos given that they post videos.

P(A/B) = ?

Solution:

Formula to be used to find the required conditional probability:

$P(A/B) = \dfrac{P(A \cap B)}{P(B)}$

For this, $P(A \cap B)$ is required.

Formula

$P(A \cup B) = P(A) + P(B) - P(A \cap B)$

$0.52=0.47+0.28-P(A\cap B)\\\Rightarrow P(A\cap B)=0.23$

Now, the required conditional probability is:

$P(A/B) = \dfrac{P(A \cap B)}{P(B)}\\\Rightarrow P(A/B) = \dfrac{0.23}{0.28}\\\Rightarrow \bold{P(A/B)} = 0.82}$

So, the answer is 0.82.

5 0

4 years ago

`9` is `50\%` of what number?

sweet [91]

Answer:

Step-by-step explanation:

4 0

3 years ago