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3 years ago

What is the approximate area of a circle with a radius of 4 feet? Use 3.14

Mathematics

1 answer:

Eva8 [605]3 years ago

8 0

Answer:

≈ 50 ft²

Step-by-step explanation:

Area of circle:

A = πr²

Given:

r = 4 ft, π = 3.14

Then:

A= 3.14 * 4² = 50.24 ≈ 50 ft²

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Find a three digit number. The tens digit is 3 time the hundreds digit. The sum of the digits is 15. If you reverse the digits,

tresset_1 [31]

Answer:

number = 267

Step-by-step explanation:

i am a 3 digit number divisible by 3.

100a + 10b + c

my tens digit is 3 times as great as my hundreds digit

b = 3a, from this we know a = 1, 2, 3, then b = 3, 6, 9

and the sum of my digits is 15.

a + b + c = 15

if you reverse my digits i am divisible by 6 and 3

100c + 10b + a

this is a logic problem, an equation won't help us here

From the given information b = 3a, and the sum of the 3 digits = 15, we have:

1 3 ___; three single digits can't add up to 15

2 6 _7_; this has to be the number

3 9 _3_; reverse number is not different

Check for division by 3 and 6

267/3 = 89

762/6 = 127

267 is the number

3 0

2 years ago

Angle $eab$ is a right angle, and $be = 9$ units. what is the number of square units in the sum of the areas of the two squares

Alla [95]

Let the measure of side AB be x, then, the measue of side AE is given by

$AE=\sqrt{9^2-x^2}$ .

Now, ABCD is a square of size x, thus the area of square ABCD is given by

$Area=x^2$

Also, AEFG is a square of size $\sqrt{9^2-x^2}$ , thus, the area of square AEFG is given by

$Area=\left(\sqrt{9^2-x^2}\right)^2=9^2-x^2=81-x^2$

The sum of the areas of the two squares ABCD and AEFG is given by

$x^2+81-x^2=81$

Therefore, the number of square units in the sum of the areas of the two squares ABCD and AEFG is 81 square units.

8 0

3 years ago

It was estimated that the United States would need 6200 more veterans in 2012. The percent error was 10%. If the estimate was lo

sdas [7]

30.......ik lol hahshdkslxpazplaz

5 0

3 years ago

What is 45,234*864,343

Katen [24]

It would be 3.909769126x10^10 hope this helps and all you have to is convert to standard form if you want me to do that ill do it its no problem

5 0

3 years ago

Tung rotates a square around its horizontal axis of symmetry to make a solid figure. What is the shape of the vertical cross sec

Iteru [2.4K]

The shape of the vertical cross section of the solid figure is Circle , Option A is the right answer.

What is a Circle ?

A circle is a round figure with all the points lying in the same plane .

It is given that

Tung rotates a square around its horizontal axis of symmetry to make a solid figure.

the shape of the vertical cross section of the solid figure will be a circle that can be seen in the image attached

The rotation image is also attached and the horizontal axis is taken as straight to show the formation of a circle.

Therefore Option A is the right answer.

To know more about Circle

brainly.com/question/11833983

#SPJ1

4 0

1 year ago