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Ann [662]
3 years ago
11

The low temperatures of four cities for August 26, 2007 are as follows:

Mathematics
1 answer:
yarga [219]3 years ago
6 0
Honolulu
Washington D.C.
Nome
Base Esperanza
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a pair of snow boots at an equipment store in big bear that originally cost $60 is on sale for $36.what is the rate of discount
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The answer is a 40% discount because it costs $24 less than the original price and 24 divided by 60 is .4 or 40%!
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graph the linear equation. find three points that solve the equation then plot on the graph. -3y=-x-6
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Answer : easy try yourself I hope you can

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Jorge is asked to build a box in the shape of a rectangular prism. The maximum girth of the box is 20 cm. What is the width of t
MariettaO [177]

Answer:

The width of the box is 6.7 cm

The maximum volume is 148.1 cm³

Step-by-step explanation:

The given parameters of the box Jorge is asked to build are;

The maximum girth of the box = 20 cm

The nature of the sides of the box = 2 square sides and 4 rectangular sides

The side length of square side of the box = w

The length of the rectangular side of the box = l

Therefore, we have;

The girth = 2·w + 2·l = 20 cm

∴ w + l = 20/2 = 10

w + l = 10

l = 10 - w

The volume of the box, V = Area of square side × Length of rectangular side

∴ V = w × w × l = w × w × (10 - w)

V = 10·w² - w³

At the maximum volume, we have;

dV/dw = d(10·w² - w³)/dw = 0

∴ d(10·w² - w³)/dw = 2×10·w - 3·w² = 0

2×10·w - 3·w² = 20·w - 3·w² = 0

20·w - 3·w² = 0 at the maximum volume

w·(20 - 3·w) = 0

∴ w = 0 or w = 20/3 = 6.\overline 6

Given that 6.\overline 6 > 0, we have;

At the maximum volume, the width of the block, w = 6.\overline 6 cm ≈ 6.7 cm

The maximum volume, V_{max}, is therefore given when w = 6.\overline 6 cm = 20/3 cm  as follows;

V = 10·w² - w³

V_{max} = 10·(20/3)² - (20/3)³ = 4000/27 = 148.\overline {148}

The maximum volume, V_{max} = 148.\overline {148} cm³ ≈ 148.1 cm³

Using a graphing calculator, also, we have by finding the extremum of the function V = 10·w² - w³, the coordinate of the maximum point is (20/3, 4000/27)

The width of the box is;

6.7 cm

The maximum volume is;

148.1 cm³

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3 years ago
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In the order of PEMDAS
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a repair bill for your car is 553. the parts cost 265. the labor cost is 48 per hour write and solve an equation to find the num
Effectus [21]

Let's represent the number of hours with the variable 'h' (or whatever letter you want it to be):

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