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MArishka [77]
3 years ago
15

Need help solving please.​

Mathematics
1 answer:
3241004551 [841]3 years ago
3 0

Answer:

25/36

Step-by-step explanation:

<u>Solved in steps:</u>

  • - 2/9 - ( -11/12) =
  • - 2/9 + 11/12 =
  • - 2*4/9*4 + 11*3/12*3 =
  • -8/36 + 33/36 =
  • 25/36

Simplest fraction is 25/36

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Sarah drives 1 2/3 hours on Monday. She drives 2 1/6 hours on Tuesday. How far does Sarah drive in those two days?​
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3 5/6

Step-by-step explanation:

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The base of a rectangular tank measures 10 ft by 20 ft. The tank is 16 ft tall, and its top is 10 ft below ground level. The tan
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Answer:

Step-by-step explanation:

Given a rectangular tank with dimension (10ft by 20ft by 16ft)

Then the volume of the tank is

Volume =length × breadth ×height

Volume=10×20×16=3200ft³

V=3200ft³

Then,

∆F= weight density × volume

∆F= 62.4×3200

∆F= 199,680 lb

Then,

Let the 0-point on the x-axis be at the bottom of the tank, so the level of the water ranges from x = 0 to x = 16ft. (It would just as well to let 0 be ground level and let x range from x = −26ft to x − 0.) Then a slice of water at level x is raised (26− x)ft

Then ∆x=(26-x)ft

Work is given as

W= -∫F∆xdx. From 0 to 16

W= -∫199,680(26-x)dx From 0 to 16

W=-199,680∫26-x dx From 0 to 16

W=-199,680 (26x-x²/2). From 0 to 16

W=-199,680(26×16-0.5×16² -0-0)

W=-199,680(288)

W=-57,507,840J

The work done to empty the tank is 57,507,840J

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