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
gladu [14]
3 years ago
7

A photographer is planning to enlarge a photograph by a scale factor of 1:5 . The original photograph has an area of 154 square

inches.
What is the area of the new photograph?

Enter your answer in the box.
Mathematics
1 answer:
uranmaximum [27]3 years ago
6 0
Whenever you are given a scale factor, that factor will apply to each dimension and because area is a two dimensional measurement, you multiply the area by 5 twice (so x5 x5). This means the new area would be 154x5^2. The new area of the photograph is 3850 square inches.
You might be interested in
Please help quickly !!!! thank youuu!
Alecsey [184]

Answer: you multiply the 2 numbers and divide it by half then your answer is the easy way to do it.

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
How to Evaluate9^ 1/2<br>Lesson name- Algebra​
tangare [24]

Answer:

ayan po answer nasa picture

4 0
3 years ago
Read 2 more answers
I<br> -72<br> –54<br> -36<br> y<br> 25<br> 13<br> 1<br> What is the y-intercept of the line?
Allisa [31]

Answer:

  -23

Step-by-step explanation:

As I increases by 18, y decreases by 12. From the last value in the table, I needs to increase by 2·18 for it to become zero. Hence the y-intercept will be 2·12 less than the last value in the table:

  1 - 2·12 = -23 . . . the y-intercept

6 0
3 years ago
Find the circumference of the circle. Round your answer to two decimal places if necessary <br> 4cm
ratelena [41]

Answer:

I think its 12.56

Step-by-step explanation:

Multiply 4 and 3.14(thats pi)

7 0
2 years ago
A radio telescope has a parabolic surface, as shown below.
krek1111 [17]
OK, so the graph is a parabola, with points x=0,y=0; x=6,y=-9; and x=12,y=0

Because the roots of the equation are 0 and 12, we know the formula is therefore of the form

y = ax(x - 12), for some a

So put in x = 6

-9 = 6a(-6)

9 = 36a

a = 1/4

So the parabola has a curve y = x(x-12) / 4, which can also be written y = 0.25x² - 3x

The gradient of this is dy/dx = 0.5x - 3

The key property of a parabolic dish is that it focuses radio waves travelling parallel to the y axis to a single point. So we should arrive at the same focal point no matter what point we chose to look at. So we can pick any point we like - e.g. the point x = 4, y = -8

Gradient of the parabolic mirror at x = 4 is -1

So the gradient of the normal to the mirror at x = 4 is therefore 1.

Radio waves initially travelling vertically downwards are reflected about the normal - which has a gradient of 1, so they're reflected so that they are travelling horizontally. So they arrive parallel to the y axis, and leave parallel to the x axis.

So the focal point is at y = -8, i.e. 1 metre above the back of the dish.
5 0
2 years ago
Other questions:
  • 6^2-3^4 divided by 3^4
    8·1 answer
  • Is 20/100 equivalent to 1/5
    14·2 answers
  • Choose the correct simplification of the expression (6x2y)2(y2)3.
    5·2 answers
  • The type of flower shown in the table make up an arrangement what percent of the flowers in the range that are roses
    5·1 answer
  • Solve y=x2-5 for x.
    5·1 answer
  • The table shows sets of ordered pairs that form a relation. Does each set of ordered pairs represent a function? Select Function
    9·1 answer
  • *EXTRA POINTS ASAP*
    14·1 answer
  • the length of a rectangle is increased by 15% while its perpendicular height is decreased by 15%. determine, if any, the percent
    12·1 answer
  • Simplify by combining like terms 4x(x+9)+10x
    14·1 answer
  • Multiply the binomials. ( 7 x − 12 ) ( 9 x − 8 )
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!