Y would equal 0. 2x2=4 and 4-4=0.
The object should be placed 20/cm from the lens so as to form its real image on the screen
<h3>Mirror equation</h3>
The mirror equation is given according to the expression below;
1/f = 1/u + 1/v
where
f is the focal length
u is the object distance
v is the image distance
Given the following parameters
f = 5cm
v = 20cm
Required
object distance u
Substitute
1/5 = 1/u +1/20
1/u = 1/5-1/20
1/u = 3/20
u = 20/3 cm
Hence the object should be placed 20/cm from the lens so as to form its real image on the screen
Learn more on mirror equation here; brainly.com/question/27924393
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Answer:
The diameter is 24 so the radius is 12 then we do pi*r^2 or pi*12^2
We can use our numbers and get pi*144 so the area of the circle is 144pi.
If they have given you what pi is
EX:( 22/7 or 3.14)
Just use that instead of pi and multiply 144 to that