E. weight = mass x gravitational field strength i. mass as subject
ii. gravitarional field strenght as subject

f. density=mass/volume

i. mass as subject
ii. volume as subject
iii. state the relationship between density and mass
iv. state the relationship between densith anf volune

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

there are no contact forces mentioned on the list of choices that you've provided.