1. The problem statement, all variables and given/known data What is the answer to (72.4meters)*(cos58)? How many significant figures does it have, and why? 2. Relevant equations "The least number of significant figures in any number of the problem determines the number of significant figures in the answer." cos58=0.529919264233........... 3. The attempt at a solution The answer should have 3 significant figures, because 72.4 has the least number of significant digits(3), and cos58 has many. I multiplied 72.4 with cos58 using a calculator, and it gave me the result 38.366154..... I rounded up to 3 figures, and found (38.4m). When i entered the question on wolfram alpha, it gave me the real result, 38.37m.