All categories

3 years ago

What is the area of a circle with a circumference of 25.12 meters?

Mathematics

1 answer:

lesantik [10]3 years ago

3 0

Area of a circle=πr^2

circumference of a circle= 2πr

circumference of a circle=25.12

2πr=25.12

r=25.12÷2π=4

radius=4

Are of circle= πr^2=π4^2=50.28cm^2

You might be interested in

7 x [(7+7) divided 7] =

galben [10]

BIDMAS

Step-by-step explanation:

FIRST DO 7+7÷7 AND TIMES THE ANSWER BY 7

6 0

3 years ago

Read 2 more answers

The candy shop puts 10 ounces of gummy bears in each box. How many

Nostrana [21]

Hi! You need 3 boxes because if you divide 21 1/4 / 10 you get 2 1/8 or 2.125 so you at least have two boxes. You will still have some left over after the two boxes so you will need another box for those. I hope this helped, Goodluck :)

3 0

3 years ago

Perform the indicated row operations, then write the new matrix.

Studentka2010 [4]

The matrix is not properly formatted.

However, I'm able to rearrange the question as:

$\left[\begin{array}{ccc}1&1&1|-1\\-2&3&5|3\\3&2&4|1\end{array}\right]$

Operations:

$2R_1 + R_2 ->R_2$

$-3R_1 +R_3 ->R_3$

Please note that the above may not reflect the original question. However, you should be able to implement my steps in your question.

Answer:

$\left[\begin{array}{ccc}1&1&1|-1\\0&5&7|1\\0&-1&1|4\end{array}\right]$

Step-by-step explanation:

The first operation:

$2R_1 + R_2 ->R_2$

This means that the new second row (R2) is derived by:

Multiplying the first row (R1) by 2; add this to the second row

The row 1 elements are:

$\left[\begin{array}{ccc}1&1&1|-1\end{array}\right]$

Multiply by 2

$2 * \left[\begin{array}{ccc}1&1&1|-1\end{array}\right] = \left[\begin{array}{ccc}2&2&2|-2\end{array}\right]$

Add to row 2 elements are: $\left[\begin{array}{ccc}-2&3&5|3\end{array}\right]$

$\left[\begin{array}{ccc}2&2&2|-2\end{array}\right] + \left[\begin{array}{ccc}-2&3&5|3\end{array}\right]$

$\left[\begin{array}{ccc}0&5&7|1\end{array}\right]$

The second operation:

$-3R_1 +R_3 ->R_3$

This means that the new third row (R3) is derived by:

Multiplying the first row (R1) by -3; add this to the third row

The row 1 elements are:

$\left[\begin{array}{ccc}1&1&1|-1\end{array}\right]$

Multiply by -3

$-3 * \left[\begin{array}{ccc}1&1&1|-1\end{array}\right] = \left[\begin{array}{ccc}-3&-3&-3|3\end{array}\right]$

Add to row 2 elements are: $\left[\begin{array}{ccc}3&2&4|1\end{array}\right]$

$\left[\begin{array}{ccc}-3&-3&-3|3\end{array}\right] + \left[\begin{array}{ccc}3&2&4|1\end{array}\right]$

$\left[\begin{array}{ccc}0&-1&1|4\end{array}\right]$

Hence, the new matrix is:

$\left[\begin{array}{ccc}1&1&1|-1\\0&5&7|1\\0&-1&1|4\end{array}\right]$

3 0

3 years ago

Read 2 more answers

Help me ASAP giving brianliest!!!!!<br><br>Find the X

ioda

Hey! So I’m pretty sure you multiply 56 and 2, then you swap the sides of the equation. Answer: X=112

6 0

3 years ago

Find the surface area of a rectangular prism that has the following dimensions.

son4ous [18]

Answer:

Surface Area is 306

Step-by-step explanation:

I go on googlw and ask what the area is and google for sum reason only gives surface area and not area so I guess thins time it worked out!

Here's the link:

https://www.google.com/search?surl=1&rlz=1CAZGSZ_enUS814&ei=F4HUXM7LEZPZ9AOYv5nQBg&q=what+is+the+area+of+a+rectangular+prism&oq=what+is+the+area+of+a+rectangler+prism&gs_l=psy-ab.12...0.0..94365...0.0..0.0.0.......0......gws-wiz.o7r-UZ2uYlg&safe=active&ssui=on

3 0

3 years ago

Read 2 more answers