Aperson ride a bicycle 10 miles from point a to point b it takes two hours what is the persons velocity in miles per hour

a. -10mph
b. 0mph
c. 5mph
d. 10mph

Can someone me with 6 to 10 plz this is for masteries test.

What is the mass of 0.750 mole of aluminum oxide, al2o3?

Sort these isotopes by whether they are most likely to undergo fusion or fission. hydrogen-3, uranium-233, plutonium-239, hydrogen-1, helium-3, plutonium-241