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Basile [38]
3 years ago
10

Justin is covering the outside of an open shoe box with colorful paper for a class project. The shoebox is 30 cm long, 20 cm wid

e, and 13 cm high. How many square centimeters of paper are needed to cover the outside of the open shoebox? Explain your strategy.
Mathematics
2 answers:
Rama09 [41]3 years ago
7 0
Just multiply 30cm x 20cm x 13cm and you will get the answer of 7,800
e-lub [12.9K]3 years ago
5 0
Are you trying to find like the volume
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konstantin123 [22]

For the equation  F(x) = ax² + bx + c we have:

  • maximum value if a<0
  • minimum value if a>0

F(x) = -3x² + 18x + 3    ⇒  a = -3, b = 18

a < 0    ⇒   the function has a maximum value

Quadratic function has the maximum value (or minimum) at vertex of its parabola.

The maximum value is k at x=h where:  h=\dfrac{-b}{2a}  and  k = F(h)

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<h3> The function has a maximum value of 30 at x = 3</h3>

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=3+3i-13-15i
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