1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Fantom [35]
3 years ago
14

Scale factor: 1:4

Mathematics
1 answer:
mojhsa [17]3 years ago
5 0

Answer:

<em>The area of the real object is 480 square cm</em>

Step-by-step explanation:

<u>Scaling</u>

Objects can be represented in a reduced or augmented size by using scaling which is basically multiplying or dividing by a constant factor.

The scale factor (f) converts a real dimension (x) into a scaled dimension (y) and vice-versa and is computed as:

\displaystyle f=\frac{x}{y}

If the magnitudes are areas, the scaling factor is squared:

\displaystyle f^2=\left(\frac{x}{y}\right)^2

And for volumes:

\displaystyle f^3=\left(\frac{x}{y}\right)^3

If the scale factor is 4, the area of a 30 square cm object is scaled to:

30 * 4^2 = 480

The area of the real object is 480 square cm

You might be interested in
A= (4,5) B= (7,-9) what is AB ?
VMariaS [17]
If you are needing to find the distance between the two points, you must use a simple formula, cleverly named, the distance formula. Since I can't input special characters into the answer box, I'll explain it the best I can.

( The square root of (  (x - x)^2 + (y - y)^2 )  )

First, we need to find the first x subtracted from the second x, as so:
(4,5) and (7,-9)

4 - 7 = -3

Now, we square the -3.

-3^2 = 
-3 * -3 = 9

Next, we have to find the first y subtracted from the second y.
(4,5) and (7,-9)

5 - (-9) = 14

Now, we square the 14.

14^2 =
14 * 14 = 196

Let's see how the numbers fit in the formula:

sqrt((x - x)^2 + (y - y)^2)

sqrt((4 - 7)^2 + (7 - (-9))^2)

sqrt((-3)^2 + (14)^2)

sqrt( 9 + 196 )

This is where we currently are in the formula, all we have to do now is square root the total of 9 + 196.

sqrt( 9 + 196 )
sqrt( 205 )

The square root of 205 = 14.31782106...

There are a few answers you can consider:

1) sqrt(205)
2) 14.32 units
or
3) 14.31782106

Depending on the answer you desire, use the one that sounds the most correct to you. Although all three are correct, it may not be the answer you require. 

Hope I could help! If my math is incorrect, or I provided answers you were not looking for, please let know! However, if my answer is correct and well explained, please consider marking my answer as <em>Brainliest</em>! :)

Have a good one.
God bless!
4 0
3 years ago
Find a quadratic equation whose roots are 1.5 +√2 and 1.5-√2expressing it in the form of ax^2+bx+c+c=0 where a,b and c are integ
Ilia_Sergeevich [38]

0 = f(x) = (x - r)(x - s) = x² - (r+s) + rs

We have r=1.5+√2,  s=1.5 -√2 so r+s = 3 and

rs = (1.5+√2)(1.5 - √2) = 1.5² - (√2)² = 2.25 - 2 = 0.25

f(x) = x² - 3x + -.25

For integer coefficients we mulitply by 4,

g(x) = 4f(x) = 4x² - 12x - 1

Answer:  4x² - 12x - 1 = 0

5 0
3 years ago
Subtract the following:<br> –7 – 7=<br> 7 –<br> 7=<br> -7-(- 7) =<br> 7- (-7)=
Ratling [72]

Answer:

A. -7 - 7 = -14

B. 7 - 7 = 0

C. -7 - (-7) = 0

D. 7 - (-7) = 14

5 0
3 years ago
Read 2 more answers
Joan Messineo borrowed ​$47,000 at a 5​% annual rate of interest to be repaid over 3 years. The loan is amortized into three​ eq
tester [92]

Answer:

a) The value of the Annual Payment is A=$17,258.80

b) Is the picture in the attachment file

c) As you can see it in the picture with each payment, balance comes down, due it is the interest base, Interest portion comes down too.

Step-by-step explanation:

Hi

a) First of all, we are going to list the Knowns: VP=47000, i=5% and n=3, Then we can use A=\frac{VP}{\frac{1-(1+i)^{-n} }{i} } =\frac{47000}{\frac{1-(1+0.05)^{-3} }{0.03} }=17258.80. So this is the value of the Annual Payment

6 0
3 years ago
What is the volume of this figure?
AysviL [449]
What figure , are you trying to figure the volume for
4 0
3 years ago
Other questions:
  • betty wants to install new carpet in her room the room is 15ft and the width 15ft. if the cost of the carpet is £8per square foo
    10·1 answer
  • Which type of transformation is shown in the graph below?
    10·2 answers
  • A restaurant makes three batches of tomato soup using the recipe shown each batch contains a different total amount of soup
    10·2 answers
  • A+b-c=180 Solve the equation
    8·2 answers
  • 10 POINTS Which of these are correct? also, isn't true that you can choose any 2 points for Rise/Run when finding the slope?
    7·1 answer
  • The leash you use to walk your dog is 11.7 feet long. When you walk your dog you hold the leash 2.1 feet above the point where t
    14·1 answer
  • 5st + 8s +9t -2st + 7t
    15·2 answers
  • Write and equation for the trend line shown
    15·1 answer
  • Last one i thibk <br> n nm ,jnp908yt7uryfhgj=o\987654321234567890-[';lkjhgfdsw234567i
    15·2 answers
  • The table below shows the distribution of students by age in a high school
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!