Un paracaidista salta de un helicóptero desde una altura de 4 km. Después de descender 55 m, abre su paracaídas y cae con velocidad constante de 3 m/s. Calcula el tiempo

i think the answer is a, hope this is right, that would be my best guess.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.