Angela bought pins and needles for sewing. The pins each weigh , and the needles each weigh . What is the total weight of the pins and needles Angela bought?
put in scientific notation form
The total weight of the pins is 10*0.002 = 0.02 kg
The total weight of the needles is 5*0.005 = 0.025 kg
Therefore, the total weight of the pins and needles is 0.02 + 0.025 = 0.045 kg
In scientific notation, this would be 4.5 x 10^-2 kg.