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Zanzabum
3 years ago
9

I got the answer 0.007853982 inches sq, but it says it’s not correct, what am I doing wrong?

Mathematics
1 answer:
sesenic [268]3 years ago
7 0

Answer:

Area of pupil = 0.007855 square inch.

Step-by-step explanation:

Given the following data;

Diameter = 0.1 inch

To find the area of the pupil (circle);

Area of circle = π(D/2)²

Area of pupil = 3.142*(0.1/2)²

Area of pupil = 3.142*(0.05)²

Area of pupil = 3.142*0.0025

Area of pupil = 0.007855 square inch.

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2. A certain TV can be purchased from the manufacturer for $160. A certain online retailer has a standard markup of 30%, and a c
Vanyuwa [196]
Price, when purchased online:  1.30($160)
Price, when purchased at superstore:  1.40($160)

Difference in prices:  1.40($160) - 1.30($160) = 0.10($160) = $16

A higher markup brings a higher retail price.
8 0
3 years ago
What is 362,000 rounded to the nearest ten thousand
Anon25 [30]

Answer:

360,000

Step-by-step explanation:

4 0
2 years ago
What are the coordinates of the y-intercept of the equation 5x - 3y = 2?
Nikolay [14]

Answer:

E

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
The length of a rectangle is 8feet less than the width. The perimeter is 64 feet. Find the length and the width
nataly862011 [7]

Answer:

Length = 4 feet

Width = 4 feet

Step-by-step explanation:

The perimeter of a rectangle formula = 2L + 2W

Where L = Length

W = Width

The length of a rectangle is 8feet less than the width.

Hence,

L = 8 - W

The perimeter is 64 feet.

Hence,

64 = 2(8 - W) × 2W

64 =( 16 - 2W )2W

64 = -4W² + 32W

4W² - 32W + 64 = 0

Factorise

4W² - 16W - 16W + 64 = 0

4W (W - 4) - 16(W - 4) = 0

W - 4 = 0

W = 4

Width = 4

Solving for L

L = 8 - W

L = 8 - 4

L = 4

Therefore,

Length = 4 feet

Width = 4 feet

7 0
3 years ago
A square tile has an area of 324 square inches. what is the perimeter of the square tile in inches?
kotykmax [81]

The formula of an area of a square: A=a^2


a - side


We have: A=324\ in^2


substitute:


a^2=324\to a=\sqrt{324} \to a=18\ in


The fromula of a perimeter of a square is: P=4a


substitute:


P=4\cdot18=72\ in^2

7 0
3 years ago
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