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Romashka-Z-Leto [24]
3 years ago
14

What is (2.1) ⋅ (4.7) and why?

Mathematics
2 answers:
OverLord2011 [107]3 years ago
8 0
2.1 . 4.7 all u gatta do is put this into google
igomit [66]3 years ago
6 0

bcs in (2.1).(4.7),<em> </em><em>the</em><em> </em><em>middle</em><em> </em><em>one</em><em> </em><em>dot</em><em> </em><em>means</em><em> </em><em>multiplication</em><em>.</em><em>s</em><em>o</em><em> </em><em>we</em><em> </em><em>have</em><em> </em><em>to</em><em> </em><em>multiply</em><em>.</em>

<h2><em><u>hope</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>will</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em></h2>

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A community swimming pool is a rectangular prism that is 30 feet long, 12 feet wide, and 5 feet deep. The wading pool is half as
topjm [15]

Answer:

The volume of the community swimming pool is 4 times greaters than the volume of the wading pool.

Step-by-step explanation:

By definition of rectangular prism, we get the respective formulas for the volumes of the community swimming pool and the wadling pool, respectively:

Community swimming pool

V_{c} = l\cdot w\cdot h (1)

Wading pool

V_{w} = \left(\frac{1}{2}\cdot l \right)\cdot \left(\frac{1}{2}\cdot h\right)\cdot w (2)

Where:

l – Length of the swimming pool, measured in feet.

h – Depth of the swimming pool, measured in feet.

w – Width of the swimming pool, measured in feet.

V_{c} – Volume of the community swimming pool, measured in cubic feet.

V_{w} – Volume of the wading swimming pool, measured in cubic feet.

The ratio of the volume of the community swimming pool to the volume of the wadling pool is:

\frac{V_{c}}{V_{w}} = \frac{l\cdot w \cdot h}{\left(\frac{1}{2}\cdot l \right)\cdot \left(\frac{1}{2}\cdot h\right)\cdot w} (3)

\frac{V_{c}}{V_{w}} = \frac{1}{\frac{1}{4} }

\frac{V_{c}}{V_{w}} = 4

The volume of the community swimming pool is 4 times greaters than the volume of the wading pool.

8 0
2 years ago
Read 2 more answers
Fill in the gaps in this sequence: -8, -19, -30, _ , _.<br> (Geometric and arithmetic sequences)
gavmur [86]

-8, -19, -30, -49 , -60

<u>Step-by-step explanation:</u>

Here we have the following sequence :

-8, -19, -30, _ , _

  • First term of sequence is -8 .
  • Second term of sequence is -19 : -8-11 = -19
  • Third term of sequence is -30 : -19-11 = -30
  • Fourth term of sequence is : -30-11 = -49
  • Fifth term of sequence is : -49-11 = -60  

Following sequence was an AP( Arithmetic Progression ) with first term as -8 i.e. a = -8 and common difference d = -11 having general equation as : -8 -11n .

6 0
3 years ago
I need help pls answer this!!!
Digiron [165]

Answer:

90

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
In 2003, the population of an African country was about 22.5 million people, which is 1 million more than
Zepler [3.9K]

Answer:

Population of Africa in 2003 is 22.5 million

population of Africa in 1950 is 1 million - 22.5 million /5

21.5million / 5

21500000/5

4300000

4.3 million people

8 0
3 years ago
What does a equal -5(6a+21)=-15
Anettt [7]
Step 1 remove paranthesis
(-30a-105)=-15

Step 2: Move constant to RHS (take not negative sign is removed if sides are changed and vice versa)

-30a=-15+105
-30a=90

Step 3: Simplify
-a=3

Step 4: remove negative sign from variable
a=3
6 0
3 years ago
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