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kvasek [131]
3 years ago
6

PLEASE HELP! A large spool holds 78.5 meters of steel cable.

Mathematics
2 answers:
vitfil [10]3 years ago
8 0

Answer:

7,850 centimeters.

jonny [76]3 years ago
5 0
78.5 meters is equal to 7850 centimeters.
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First of all we will understand the question!!

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<em>\rm \: p(x) =  - 5 {x}^{2}  + 30x + 8</em>

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<em>\rm \: p(x) =   { - 5x}^{2}  + 30x + 8  \\  \rm \: a =  - 5 \: and \: b \:  = 30</em>

  • <u>Since a<0, the function has the maximum value at x, calculated by substituting a and b into x=-b/2a</u>

<u>\rm \: x =  \frac{30}{ 2 \times  (- 5)}</u>

  • <u>Solve</u><u> </u><u>the</u><u> </u><u>equation</u><u> </u><u>for</u><u> </u><u>x</u><u> </u>

<u>\rm \: x = 3</u>

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