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musickatia [10]
3 years ago
8

Rectangles J and K are similar. If the area of rectangle J is 440, what is the area of rectangle K? I need this today

Mathematics
1 answer:
Hunter-Best [27]3 years ago
4 0

Answer:

Area = 27.5

Step-by-step explanation:

Given

J_{Area} = 440

J_{Width} = 22

K_{Width} = 5.5

<em>See attachment</em>

Required

Determine the area of K

First, we need to calculate the length of the rectangle  J

J_{Length} * J_{Width} = J_{Area}

This gives:

J_{Length} * 22 = 440

Divide both sides by 22

\frac{J_{Length} * 22}{22} = \frac{440}{22}

J_{Length} = 20

So, the length of the rectangle J is 20.

Since both shapes are similar, then:

J_{Length} : J_{Width} = K_{Length} : `K_{Width}

Substitute the known values:

20 : 22 = K_{Length} : `5.5

Express as fraction:

\frac{20 }{ 22 }= \frac{K_{Length} }{ `5.5}

Make Length, the subject of formula

K_{Length} = \frac{5.5 * 20}{22}

K_{Length} = \frac{110}{22}

K_{Length} = 5

The area of K is:

Area = K_{Length} * K_{Width

Area = 5.5 * 5

Area = 27.5

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You have two rectangular prisms (Prism A and Prism B). Prism A has the following dimensions: length x, width y, and height z. Pr
noname [10]

Answer:

Part A) The surface area of prism B is equal to the surface area of prism A multiplied by the scale factor (m) squared  

Part B) The Volume of prism B is equal to the Volume of prism A multiplied by the scale factor (m) elevated to the cube

Step-by-step explanation:

Part A) we know that

The scale factor is equal to m

The surface area of the prism is equal to

S=2B+Ph

where

B is the area of the base

P is the perimeter of the base

h is the height of the prism

we have

Prism A

B=xy\ units^{2}

P=2(x+y)\ units

h=z\ units

substitute

SA=[2(xy)+2(x+y)z]\ units^{2}

Prism B

B=(mx)(my)=(xy)m^{2}\ units^{2}

P=2(mx+my)=2m(x+y)\ units

h=mz\ units

substitute

SB=[2(xym^{2})+2m(x+y)mz]\ units^{2}

SB=[2(xym^{2})+2m^{2}(x+y)z]\ units^{2}

SB=m^{2}[2(xy)+2(x+y)z]\ units^{2}

therefore

The surface area of prism B is equal to the surface area of prism A multiplied by the scale factor (m) squared      

Part B) we know that

The volume of the prism is equal to

V=Bh

where

B is the area of the base

h is the height of the prism

we have

Prism A

B=xy\ units^{2}

h=z\ units

substitute

VA=[(xyz]\ units^{3}

Prism B

B=(mx)(my)=(xy)m^{2}\ units^{2}

h=mz\ units

substitute

VB=[(xym^{2})mz]\ units^{3}

VB=[(xyzm^{3})]\ units^{3}

therefore

The Volume of prism B is equal to the Volume of prism A multiplied by the scale factor (m) elevated to the cube  

3 0
3 years ago
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Answer:

0.002

Step-by-step explanation:

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Answer:

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At right angles.)<br> 4 m<br> 4 m<br> 2 m<br> 2 m<br> 7 m<br> 2<br> 3 m<br> 7 m<br> 11 m
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Answer:

71

Step-by-step explanation:

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