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2 years ago

Formular for area of a circle

Mathematics

2 answers:

-Dominant- [34]2 years ago

8 0

Answer:

Tr2

Step-by-step explanation:

pie * radius * radius

Karo-lina-s [1.5K]2 years ago

7 0

Answer:

πr²

Step-by-step explanation:

The circumference of a circle is given to be 2πr, and its radius to be r.

Area = 1/2 x circumference x radius
Area = 1/2 x 2πr x r
Area = πr²

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Y+2=-(x+4) in slope intercept form

never [62]

Step-by-step explanation:

we can begin by expressing the equation in

slope-intercept form

$∙y=mx+b$

$⇒y+2=−x+4$

$← distributing bracket$

$⇒y=−x+2$

$we \: can \: now \: find \: the \: intercepts, that \: is \: where \: the \: line \: crosses \: the \: x \: and \: y \: axes$

$∙ let \: x = 0, in \: the \: equation \: for \: y-intercept$

$∙ let \: y = 0, in \: the \: equation \: for \: x-intercept$

$x=0→y=0+2⇒y=2← y-intercept$

$y=0→0=−x+2⇒x=2← x-intercept$

$plot \: (0,2) \: and \: (2,0) \: and \: draw \: a \: straight \: line \: through \: them \: graph \: ({-x+2 [-10, 10, -5, 5]}$

7 0

2 years ago

There are 15 research doctors participating in the study and the research board needs to be established with the offices of dire

Nat2105 [25]

Answer:

32760

Step-by-step explanation:

There are 4 positions on the board. There are 15 possible candidates for the first position. That leaves 14 candidates for the second position. Which leaves 13 for the third position, and 12 for the fourth position.

15 × 14 × 13 × 12 = 32760

3 0

3 years ago

Read 2 more answers

The cylinder below has a volume of 536.94 cubic inches. What is the radius of the cylinder? (Use 3.14 for π.)

Anestetic [448]

We have been given volume of the cylinder which is 536.94 cubic inches. Now question says to find the radius of the cylinder.

Then we need to use formula of volume of cylinder which is given by :

$Volume = \pi r^2 h$

We see that there are three unknown values in the formula: {volume, radius-r, height-h}

So to find any one of them we must know other two values.

Volume is given but height is missing. So just for explanation i'm going to use height of the cylinder h= 19 inches

Now plug the value of volume and height in above formula

$536.94 = \pi r^2 *19$

$536.94 = 3.14 r^2 *19$

$536.94 = 59.66r^2$

$\frac{536.94}{59.66} =r^2$

$9=r^2$

take square root of both sides

3=r

Hence radius of the cylinder is 3 inches.

3 0

3 years ago

Solve the system with substitution 72 +10y = 36 y = 2x + 9

mr_godi [17]

Answer:

x= -63 y= -117

Step-by-step explanation:

72+10(2x+9)=36

72+20x+90=36

162+20x=36

20x=-126

×= -63

y= 2(-63)+9

y=-126+9

y= -117

8 0

2 years ago

PLEASE HELP 20 POINTS One day, River writes down the numbers $1,$ $2,$ $\dots,$ $999.$ What is the sum of all the digits that Ri

Temka [501]

Answer:

LOL this is from AOPS

Step-by-step explanation:

LOL tryna cheat out here

6 0

3 years ago