Answer:
.
Step-by-step explanation:
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 whole area of all the wood is 36
Step-by-step explanation:
The formula for area of a rectangle is length times width. A=lw
You plug the numbers into the formula: A=2*3 = 6
The area for one piece of wood is 6 ft
If you take multiply one area of wood by the amount of wood - you get the whole area amount of all the wood. So 6*6 = 36.
Answer:
-4/3
Step-by-step explanation:
mtan × mline = -1
mtan× 3/4 = -1
mtan =-4/3
