Calculate the following and report using the correct number of significant figures and correct e notation: 1020 x 4.388e18 *

Answer 1

Your answer can have no more sig figs than the least number of sig figs in the calculation. The number 4.388 x 10¹⁸ has 4 sig figs, but 1020 can have 3 OR 4. The last 0 may or may not be significant. Since we don't know, we should assume it has only 3, hence the calculated answer should have no more than 3. So, after doing the calculation the result of 4.476 x 10²¹ should be expressed as 4.48 x 10²¹