I was thinking the answer was three but I’m not entirely sure help pls?

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

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