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Aleksandr [31]
3 years ago
10

Find sin A.16/12, b.16/20, c.12/20, d. 12/16, I will give branliest!!!, pls help!

Mathematics
2 answers:
RUDIKE [14]3 years ago
8 0

Answer:

B) 16/20

Step-by-step explanation:

sin∅=opposite/hypotenuse

sin∅=16/20

Therefore, your answer is B.

Semmy [17]3 years ago
3 0

Answer:

(12/16)

Step-by-step explanation:

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Air containing 0.04% carbon dioxide is pumped into a room whose volume is 6000 ft3. The air is pumped in at a rate of 2000 ft3/m
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the concentration at 10 minutes= 0.4+0.0133= 0.4133%

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Air containing 0.04% carbon dioxide

V, volume of room is 6000 ft3.

Q, rate of air 2000 ft3/min,

initial concentration of 0.4% carbon dioxide,

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firstly, we find the time taken for air to completely filled the room

Q = V/t

t = V/Q = 6000/2000 = 3min

so, its take 3mins for air to be completely filled in the room and for exhaust air to move out.

there is  an initial concentration of 0.4% carbon dioxide, and the air pump in is 0.04%.

therefore,

3mins = 0.04% of CO2

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1sec = 0.04/180 = 0.00022%/sec

so at any time the concentration of CO2 is 0.4 + 0.00022 =0.40022%/sec

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