Give b is the midpoint of ac, what is ac?

What is the volume of the sphere shown below with a radius of 3?

The conversion factor relating feet to meters is 1 ft=0.305 m. keep in mind that when using conversion factors, you want to make sure that like units cancel leaving you with the units you need. you have been told that a certain house is 164 m2 in area. how much is this in square feet?

Which statement justifies why angle ebc measures 90?