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3 years ago

19+7÷2-5 by including one pair of brackets to amke the total value equal to 8

Mathematics

1 answer:

Karo-lina-s [1.5K]3 years ago

7 0

Answer:

firstly, add 19+7=26

then, divide 26 by 2, 26÷2= 13

in last, subtract 13 from 5, 13-5= 8

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Factor 25 into prime numbers

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nirvana33 [79]

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And replacing we got:

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Step-by-step explanation:

For a tank similar to a cylinder the volume is given by:

$V = \pi r^2 h$

For this case we know that $r=5m$ represent the radius, $h = 10m$ the height and the rate given is:

$\frac{dV}{dt}= \frac{100 L}{min}$

For this case we want to find the rate of change of the water level when h =6m so then we can derivate the formula for the volume and we got:

$\frac{dV}{dt}= \pi r^2 \frac{dh}{dt}$

And solving for $\frac{dh}{dt}$ we got:

$\frac{dh}{dt}= \frac{\frac{dV}{dt}}{\pi r^2}$

We need to convert the rate given into m^3/min and we got:

$Q = 100 \frac{L}{min} *\frac{1m^3}{1000L}= 0.1 \frac{m^3}{min}$

And replacing we got:

$\frac{dh}{dt}=\frac{0.1 m^3/min}{\pi (5m)^2}= 0.0012732 \frac{m}{min}$

And that represent $0.127 \frac{cm}{min}$

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4 years ago

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Answer:

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Your answer would be 105. Hope this helps!

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19+7÷2-5 by including one pair of brackets to amke the total value equal to 8​

19+7÷2-5 by including one pair of brackets to amke the total value equal to 8