On Jessica's first day of work, she drove 17.3 km/hr for 251.5 km. If Jessica increases her speed to 27.3 km/hr on her second day, how much time (in hours) would she
save?

Two models of the same compound are shown. in what way is model b better than model a? model b shows the types of elements in the compound, but model a does not. model b shows the three-dimensional shape of the molecule, but model a does not. model b shows how the atoms in the molecule are connected, but model a does not. model b shows the number of atoms of each element in the molecule, but model a does not