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Aleksandr-060686 [28]
3 years ago
6

Please help, i need this today!

Mathematics
1 answer:
pav-90 [236]3 years ago
3 0
The answer is C because the x value doesn’t repeat
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Suppose a room is 5.2 m long by 4.3m wide and 2.9 m high and has an air conditioner that exchanges air at a rate of 1200 L/min.
Readme [11.4K]

Answer:

54 minutes

Step-by-step explanation:

From the question, we are given;

  • A room with dimensions 5.2 m by 4.3 m by 2.9 m
  • The exchange air rate is 1200 L/min

We are required to determine the time taken to exchange the air in the room;

First we are going to determine the volume of the room;

Volume of the room = length × width × height

                                  = 5.2 m × 4.3 m × 2.9 m

                                  = 64.844 m³

Then we should know, that 1 m³ = 1000 L

Therefore, we can convert the volume of the room into L

= 64.844 m³ × 1000 L

= 64,844 L

But, the rate is 1200 L/min

Thus, time = Volume ÷ rate

                  = 64,844 L ÷ 1200 L/min

                   = 54.0367 minutes

                   = 54 minutes

Therefore, it would take approximately 54 minutes

4 0
3 years ago
What is the value of cos x°?
PolarNik [594]

Answer:

We know,

\cos(x)  =  \frac{b}{h}  =  \frac{15}{17}

so

\cos(x)  = 0.88

.....Hope this helps:)

3 0
2 years ago
Find each percent change. Round to the nearest tenth of a percent. State if it is an increase or decrease. From 46 to 89.8
Degger [83]

Answer:

78%

Step-by-step explanation:

% increase = Increase ÷ Original Number × 100

% increase= 35.8/46 *100= 77.82=78 %

3 0
3 years ago
Please Help, this is 20pts worth it.. Please Don’t waste my points.. please help..
evablogger [386]

Answer:

1. 7+62+5+4

2. 18+62+5

3.15+4+1

4.5 families

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Step-by-step explanation:

7 0
3 years ago
Square ABCD is a dilation of square ABCD. What is the scale factor​
gulaghasi [49]

Answer:

\frac{1}{3}

Step-by-step explanation:

2 divided by 6 is \frac{1}{3}

To confirm it,

6 * \frac{1}{3} =2

6 0
3 years ago
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