Anya arrived at the library on saturday morning at 11: 10 a. m. she left the library 1 hour 20 minutes later. what time did anya leave the library?

12:30 PM becuase 11+1=12 and 10+20 is 30 and going from 11 am to 12 makes it the evening

Anya left at 12:30 because she went there at 11:10. She stayed an hour so 11+10=12. She also stayed twenty minutes so 10+20=30. Therefore, it’s 12:30.

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.