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3 years ago

How many songs are on one's playlist? please help asap I think 100

Mathematics

2 answers:

earnstyle [38]3 years ago

8 0

Answer:

on mine i have around 100 but the average is 20-25 as an overall one

Rudik [331]3 years ago

3 0

Answer:

What do you mean by one? If you mean mine, I've got like 20.

Step-by-step explanation:

If that's not your question, then please elaborate.

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A storage box with a square base must have a volume of 90 cubic centimeters. the top and bottom cost $0.60 per square centimeter

Paul [167]

Answer-

For side length of 3.56 cm and height of 7.10 cm the cost will be minimum.

Solution-

Let us assume that,

x represents the length of the sides of the square base,

y represent the height.

Given the volume of the box is 90 cm³, so

$\Rightarrow V=90\\\\\Rightarrow x^2\times y=90\\\\\Rightarrow y=\dfrac{90}{x^2}$

As the top and bottom cost $0.60 per cm² and the sides cost $0.30 per cm². Total cost C will be,

$C=\text{cost for top and bottom}+\text{cost for rest 4 sides}\\\\=(2x^2\times 0.6)+(4xy\times 0.3)\\\\=(2x^2\times 0.6)+(4x\times \frac{90}{x^2}\times 0.3)\\\\=1.2x^2+ \dfrac{108}{x}$

Then,

$C'=\dfrac{d}{dx}(1.2x^2+ \dfrac{108}{x})=2.4x-\dfrac{108}\\\\C''=\dfrac{d^2}{dx^2}(1.2x^2+ \dfrac{108}{x})=2.4+\dfrac{216}{x^3}$

As C'' has all positive terms so, for every positive value of x (as length can't be negative), C'' is positive.

So, for minima C' = 0

$\Rightarrow 2.4x-\dfrac{108}{x^2}=0\\\\\Rightarrow 2.4x=\dfrac{108}{x^2}\\\\\Rightarrow x^3=\dfrac{108}{2.4}=45\\\\\Rightarrow x=3.56$

Then,

$y=\dfrac{90}{x^2}$

$y=\dfrac{90}{3.56^2}$

$y=7.10$

Therefore, for side length of 3.56 cm and height of 7.10 cm the cost will be minimum.

4 0

4 years ago

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A single die is rolled. what is P(3)

Triss [41]

Answer:

what? I am so confused. How you worded it is confusing

Step-by-step explanation:

6 0

4 years ago

Chuck wants to draw three-dimensional figure whose lateral faces are rectangles he says he can draw prisms and pyramids

user100 [1]

you can also draw a 3-dimensional cube

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3 years ago

I am a 2 dimensional shape that had 5 obtuse angles

Montano1993 [528]

Answer:

A pentagon.

Step-by-step explanation:

A pentagon is a 5-sided polygon. Its interior angles each are equivalent to 108°.

108° ≥ 90°, so the angles are obtuse.

Therefore, a 2-D shape with 5 obtuse angles is a pentagon.

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3 years ago

Which of the following is a perfect square trinomial ?

Cerrena [4.2K]

Answer:

The answer is A

Step-by-step explanation:

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3 years ago

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