If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca
At school 460 of the students walk to school the number of students who take public transit is 20% of the number of students who walk. how many students take public transit