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3 years ago

Composite shapes find the total volume of the 3D shapes round to the nearest hundredth

Mathematics

1 answer:

olasank [31]3 years ago

3 0

Answer:

2147.76 ft^3

Step-by-step explanation:

SEE IMAGE FOR SOLUTION....

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2+2=4 you should know this

nadya68 [22]

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2 years ago

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louise bought 80 metres of fencing to make an enclosure for her pet dog .tommy if louise expects a rectangular enclosure what is

OleMash [197]

Answer:

400 m^2.

Step-by-step explanation:

The largest area is obtained where the enclosure is a square.

I think that's the right answer because a square is a special form of a rectangle.

So the square would be 20 * 20 = 400 m^2.

Proof:

Let the sides of the rectangle be x and y m long

The area A = xy.

Also the perimeter 2x + 2y = 80

x + y = 40

y = 40 - x.

So substituting for y in A = xy:-

A = x(40 - x)

A = 40x - x^2

For maximum value of A we find the derivative and equate it to 0:

derivative A' = 40 - 2x = 0

2x = 40

x = 20.

So y = 40 - x

= 40 - 20

=20

x and y are the same value so x = y.

Therefore for maximum area the rectangle is a square.

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3 years ago

These two rectangles are similar which is a correct proportion for corresponding sides

hammer [34]

to make the proportion we make the ratio of the similar sides

For example

4/8 = 12/x

or we can write it as 4/12 = 8/x

or 12/x = 4/8

So last option is correct

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3 years ago

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translate the phrase:""Three times the difference of a number and 9" " into an algebraic expression .Let x represent the real nu

erastovalidia [21]

3(x-9) that is the answer to this one.

6 0

3 years ago

The diagram shows a right-angled triangle.

Margarita [4]

1/sin(38)*7=11.4
Hope it helps

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3 years ago