if you walk for 1.5 hour at 3mph how fast should you run during the next 0.5 hours to have the average speed of 4mph 20 points ASAP

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

A50% increase followed by 33 1/2% decrease

Which expression is equivalent to (4 +6i)^2? ? -20 + 48i 8 + 12i 16 - 36i 20 + 48i