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3 years ago

A CD rack holds 40 CDs. If 8 CDs can fit on each shelf, then how many shelves are on the CD rack?Answers

Mathematics

2 answers:

ASHA 777 [7]3 years ago

8 0

Answer:

if there is 40 CDs on the shelf and 8 CDs can fit on each shelf then there would be 5 shelves. because 40÷8= 5

11111nata11111 [884]3 years ago

4 0

The answer is 5 (40 divided by 8 = 5 ) <3

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If the measure of angle 5 = 42" and the measure of angle 1 - 1179<br> find mCDF

harina [27]

Answer:

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3 years ago

A farmer is constructing a rectangular pen with one additional fence across its width. Find the maximum area that can be enclose

konstantin123 [22]

The maximum area of the pen is the highest area the pen can have

The maximum area is 16200 square yards

Let the dimension be x and y.

So, the perimeter is given as:

$\mathbf{P = 360}$

Because it has one additional fence, the perimeter is calculated as:

$\mathbf{2x + y = 360}$

Make y the subject

$\mathbf{y = 360 - 2x}$

The area is calculated as:

$\mathbf{A = xy}$

Substitute $\mathbf{y = 360 - 2x}$

$\mathbf{A = x(360 -2x)}$

Expand

$\mathbf{A = 360x -2x^2}$

Differentiate

$\mathbf{A' = 360 -4x}$

Set to 0

$\mathbf{360 -4x = 0}$

Rewrite as:

$\mathbf{4x = 360}$

Divide both sides by 4

$\mathbf{x = 90}$

Substitute 90 for x in $\mathbf{A = 360x -2x^2}$

$\mathbf{A = 360 \times 90 - 2 \times 90^2}$

$\mathbf{A = 16200}$

Hence, the maximum area is 16200 square yards

Read more about maximum areas at:

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3 years ago

Is 5/7 greater than or less than 1/3

vagabundo [1.1K]

The common denominator is 21 so 5/7 would be 15/21 and 1/3 would be 7/21 so 5/7 is greater than 1/3

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The answers are..
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