Ithink these two are simple questions.. but i need tt

Which property of fossils allow scientists to determine the relative rock ages..

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Acharge of 8.4x10^-4 c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6.7x10^-3 t. if the magnetic force is 3.5 x10 ^-2 n, how fast is the charge moving?