Zoom I'd - 9038735228 pwd -97cEeT join me for talk I'm getting bored​

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.

Case # 51173878 weighs 814 pounds; case # 51173981 weighs 803 pounds; case # 51174058 weighs 817 pounds; case 51174178 weighs 815 pounds; case # 51174248 weighs 817 pounds; case # 51174495 weighs 781 pounds; case # 51174577 weighs 828 pounds. what are the case #'s of the two cases that weigh the same amount?

How are brightness and size related when it comes to stars