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
VMariaS [17]
3 years ago
5

The width x of your iris decreases from 4 millimeters to 2 millimeters when you enter a dark room. How many times greater is the

area of your pupil after entering the room than before entering the room?
Mathematics
1 answer:
inysia [295]3 years ago
3 0

Answer:

The area of the Iris is 4 times greater.

Step-by-step explanation:

Firstly, we have to realize that we cannot solve this problem without knowing the radius of the iris. because from the information given, the radius of the iris could well be the size of the galaxy and contract from width of 4mm to 2mm and we wouldn't know!

The average radius of the iris is 6mm, so we take this value.

Now, initially the width of the iris is 4mm, that means the radius of the pupil is:

6mm-4mm=2mm

Therefore it's area A is:

A=\pi r^2=\pi (2)^2=4\pi

When the iris contracts to 2mm, the radius of the pupil becomes:

6mm-2mm=4mm

Then it's area is A:

A=\pi r^2=\pi (4)^2=16\pi

To find how many times greater this final area is than the initial area, we just divide it by the initial area:

\frac{16\pi }{4\pi } =4

This is 4 times greater than the initial area.

You might be interested in
Find the surface area.<br><br> Any help will be appreciated thank you
kozerog [31]

Answer:

37.5

Step-by-step explanation:the formula of surface area of a square is 6a²

and a is 2.5 in this case,so 6*2.5*2.5=37.5

3 0
3 years ago
Hello Please Find The Answer To This Question (easy)
irina [24]

The equation of the line that is perpendicular to y = -5/2 x + 1 and passing through (10, 3) will be y = 2/5 x + 1.

<h3>What is the linear system?</h3>

A linear system is one in which the parameter in the equation has a degree of one. It might have one, two, or even more variables.

The equation of the perpendicular line will be given as

y = mx + c

The given equation is y = -5/2 x + 1.

The slope of the line is -5/2.

Then the product of the slope of the perpendicular lines is a negative one.

-5/2 × m = - 1

m = 2/5

Then the equation will be

y = 2/5 x + c

Then the equation is passing through (10, 3). Then we have

3 = 2/5 × 10 + c

3 = 2 + c

c = 1

Then the equation is y = 2/5 x + 1.

More about the linear system link is given below.

brainly.com/question/20379472

#SPJ1

7 0
2 years ago
Can somebody plz help solve and find the correct answers!!<br> thanks so much!! :3
Naddik [55]

Answer:

m=32 p=42 r=24 x=45

Step-by-step explanation:

1. Multiply the answer with the denominator to find the missing number.

2. Check your answer by dividing the numerator and denominator to see if the equation is correct.

4 0
2 years ago
Evaluate B raised to the second power for B=9
yanalaym [24]
The answer would be 81
6 0
3 years ago
Read 2 more answers
I really need help..!
Doss [256]

Answer:

B: 1/6

Step-by-step explanation:

make 1/4 to 3/12. 7/12 + 3/12 is 10/12. So the green is 2/12. 2/12 simplified is 1/6.

4 0
3 years ago
Read 2 more answers
Other questions:
  • I need to know the volume of a cube the length is 1 unit the width is 1 unit and the height is 1/3 of a unit can someone explain
    8·1 answer
  • Let × represent th he number of television show episodes that are taped in a season. Write an expression for the number of episo
    14·1 answer
  • Find the product of -5 1/3 • 4 2/5
    13·1 answer
  • I need help on these please I really need help.<br> It's tomorrow.
    11·1 answer
  • What is the range of the function y = 2x2 + x - 1 when the domain is {-2, -1, 0, 1}?
    13·1 answer
  • Is the sum of 4.2 and 2 squared irrational or rational ?
    12·2 answers
  • 1000 times 100 in exponent
    14·1 answer
  • What is two and three hundreds seventy thousandths in decimal form
    11·1 answer
  • If the cost of a notebook is 2x-3 and the cost of a pen is x-4, what is the cost of 3 notebooks and 5 pens?
    12·1 answer
  • In the triangle below, what is the length of the side opposite the 60° angle?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!