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svlad2 [7]
3 years ago
12

Find the derivative of f(x) = 8x^2 + 11x at x = 7.

Mathematics
1 answer:
sleet_krkn [62]3 years ago
6 0
Thank you for posting your question here at brainly. Feel free to ask more questions.  

f′(x)=2∗(8x(2−1))+1∗11x(1−1)

which is

f′(x)=16x+11

then let x = 7 gives us

f′(7)=123

      <span>
<span>Hope my answer would be a great help for you. </span> </span>  

<span> </span>

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The radius of a cylindrical vessel is 7 cm and height is 1400 m . Find the cost of painting its inner curved surface area at the
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Answer:

Cost = 616000 DHS per square centimetre.

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The inner curved surface of the cylinder = 2\pirh

                                      = 2 x \frac{22}{7} x 7 x 140000

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The inner curved surface of the cylinder is 6160000 square centimetre.

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The inner curved surface of the cylinder = 6.16 x 10^{6} square centimetre.

cost of painting the inner curved surface area = \frac{6.16*10^{6} }{10}

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The cost of painting the inner surface is 616000 DHS per square centimetre.

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