A compact lantern has a focal length of 20 cm. A real object stands upright, 4.0 cm in front of the lantern. Distance, type and magnification are: D '= 4.0 cm, the actual image and the opposite direction of the object.

d '= 4.0 cm, false image and object orientation.

d '= 4.0 cm, real image and object-like orientation.

d '= 4.0 cm, false image and object-like orientation.
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i think it would be 80 km/h because 30 + 50 = 80 (sorry if this not the right answer i'm trying my best)

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y