Norachai left the mall and traveled toward
his friend's house at an average speed of
40 mph. eugene left sometime later
traveling in the same direction at an
average speed of 50 mph. after traveling
for four hours eugene caught up with
norachai. how long did norachai travel
before eugene caught up?

Brittany has designed four different birdcages, each with the same volume: a square pyramid, a cylinder, a cone, and a sphere. the zoo wants to use one of brittany’s designs but plans to change the volume of the cage. find the design change that would result in the birdcage with the greatest volume. a.) increase the area of the base of the square pyramid by a factor of ten. b.) increase the height of the cylinder by a factor of ten. c.) increase the radius of the cone by a factor of ten. d.) increase the radius of a sphere by a factor of ten.