Two lenses of power -1. 75d and 2. 75d are placed in contact. What is the focal length of the combination?.

carla slowed down in the beginning of her trip, stopped, and then sped up

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

a. are