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exis [7]
2 years ago
11

If the diameter is 20 cm what is the area based on pi

Mathematics
1 answer:
Anton [14]2 years ago
8 0

Answer:

\Large \boxed{\mathrm{100\pi  \ cm^2 }}

Step-by-step explanation:

\displaystyle area \ of \ circle \ = \ \pi (\frac{diameter}{2} )^2

\displaystyle A \ = \ \pi ( \frac{20}{2} )^2

\displaystyle A \ = \ \pi ( 10 )^2

\displaystyle A \ = \ 100\pi

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When the car moves forward by 180cm , each wheel does one full turn . What is the diameter of the wheels to the nearest cm?
Sav [38]
Since 180cm is one full turn you divide it by pie which is 3.14

=180/3.14

=180/3 (Rounded down)

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3 0
3 years ago
A solid oblique pyramid has a square base with edges measuring x cm. The height of the pyramid is (x + 2) cm. Which expression r
zavuch27 [327]

we know that

the volume of a solid oblique pyramid is equal to

V=\frac{1}{3}*B*h

where

B is the area of the base

h is the height of the pyramid

in this problem we have that

B is a square

B=b^{2}

where

<u>b=x\ cm</u>

so

B=x^{2}\ cm^{2}

h=(x+2)\ cm

substitute in the formula of volume

V=\frac{1}{3}*x^{2}*(x+2)\\ \\V=\frac{1}{3}*[x^{3} +2x^{2}]\ cm^{3}

therefore

<u>the answer is</u>

V=\frac{1}{3}*[x^{3} +2x^{2}]\ cm^{3}

4 0
2 years ago
Read 2 more answers
Solve the system of equations algebraically. Show all of your steps. (2 points)
Alex777 [14]
Did you solve this? I need it too.
6 0
3 years ago
What does K=Y/X stand for and mean?
Mamont248 [21]

Answer:

(k = y/x) which is the constant ratio between two proportional quantities y/x denoted by the symbol k which may be a positive rational number. The x value is directly proportional to the y value such as in the equation y = kx.

Step-by-step explanation:

the meaning of it means constant of proportionality

8 0
3 years ago
PLEASE HELP FAST!! WILL MARK AS BRAINLIEST IF GIVEN GOID ANSWER....​
lyudmila [28]

Answer:

x = 36

y = 37.95

Step-by-step explanation:

By geometric mean property:

{12}^{2}  = 4 \times x \\  \\ 144 = 4 \times x \\  \\ x =  \frac{144}{4}  \\  \\ x = 36 \\  \\

By Pythagoras Theorem:

{y}^{2}  =  {12}^{2}  +  {x}^{2} \\  \\  {y}^{2}  =  {12}^{2}  +  {36}^{2}  \\  \\  {y}^{2}  = 144 + 1296 \\  \\  {y}^{2}  = 1440 \\  \\ y =  \sqrt{1440}  \\  \\  y = 37.95

5 0
2 years ago
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