hi

im doing a course in complex maths for the building industry and have to pass this maths section before i go on. maths was a bad subject for me so now i need to learn. my biggest problem is notation such as one question is

convert 39cm to km and answer in scientific notation

would that be 100000cm = 1km therefore 39/100000=0.00039

is that right

and the one thats got me is

a mass rests on an area of 80mm2 and exerts a force of 320 kg m/s2. express the pressure exerted on this area in kN/cm2

i worked it out but not sure if im right

so can you all help me out i will post more soon

cheers dan