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frozen [14]
4 years ago
15

Aaron bought a new television that has a 92 in. 76 in. screen. It has a feature that splits the screen to allow him to watch 4 c

hannels at once. What is the scale factor and size for each channel when this feature is turned on? (SHOW WORK)
Mathematics
1 answer:
castortr0y [4]4 years ago
8 0

Answer:

The scale factor is equal to 1/2

The dimensions of each channel when splits the screen is 46 in x 38 in

Step-by-step explanation:

we know that

The dimensions of the new television is 92 in x 76 in

Remember that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

A1 -----> the area of the new television

A2 ----> the area of each channel when splits the screen

z-----> the scale factor

z^{2} =\frac{A2}{A1}

we have that

The area of the new television is 4 times the area of each channel

A1=4A2

(A2/A1)=1/4

z^{2} =\frac{1}{4}

z=\frac{1}{2} -----> the scale factor

so

When splits the screen, the dimension of each channel is equal to

92/2 in x 76/2 in

so

46 in x 38 in

Remember, if two figures are similar then the scale factor is equal to the ratio of their corresponding sides

<em>Verify the value of the scale factor</em>

92/46=1/2

or

76/38=1/2

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3 years ago
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1a.

0.42 =  \frac{0.42}{1}  =  \frac{42}{100}  =  \frac{21}{50}

1b. Manipulate the numbers using algebra.

100x = 42.2222. \\ 10x = 4.2222...

Then, subtract and solve for x.

90x = 38 \\ x =  \frac{38}{90}  \\ x =  \frac{19}{45}

1c. Same thing, manipulate the numbers.

100x = 42.4242... \\ x = 0.4242...

Again, subtract and solve for x.

99x = 42 \\ x =  \frac{42}{99}  \\ x =  \frac{14}{33}

2a. Jacob is pulling the 3 out of the root operation without getting the root of it.

\sqrt{75}  =  \sqrt{3}  \times  \sqrt{25 }  = 5 \sqrt{3}

2b. Without using a calculator, the only way that is feasible is by trial and error, using perfect squares. For example: you know

\sqrt{3}

is somewhere between 1 and 2, as these are the closest perfect square roots to it. Try a value, say 1.5.

{1.5}^{2}  = 2.25

Not bad, seems a bit low. Lets try 1.6.

{1.6}^{2}  = 2.56

Seems like we can go bigger. 1.7 this time.

{1.7}^{2}  = 2.89

Alright, we are getting close to 3. 1.8.

{1.8}^{2}  = 3.24

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{1.75}^{2}  = 3.0625 \\  {1.74}^{2}  = 3.0276 \\  {1.73}^{2}  = 2.9929

Alright, the value is between 1.73 and 1.74.

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Bingo, your approximation is 1.732.

3. Convert each number to a tenth-rounded decimal.

\pi = 3.1

\sqrt{3}  = 1.7

Find the square root of 5 first, as then you only have to double it for the remaining number.

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The reason I take the 2.5 is to see whether to round up or down.

Then the last one is double the previous.

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3b.

\sqrt{3}  <  \sqrt{5}   < \pi< 2 \sqrt{5}

Hope this all helps.

6 0
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The APR of Vinny’s saving account is 3.5% but interest is compounded only once a year. what is the APY of Vinny’s savings accoun
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                                                         HOI!!

ok 3.5 apr is equivelent to 2.5 so your answer would be A 

hope this helps!!!

:) :) :)


8 0
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