Felipe, a highway safety inspector, is concerned about the potential for accidents caused by boulders that fall down a sandstone cliff beside a main highway. As part of an accident simulator, Felipe models the boulders' weights using a normal distribution with a mean of 567kg and a standard deviation of 150kg .
Use the ALEKS calculator to find the percentage of boulders that weigh between 273kg and 645kg according to the model. For your intermediate computations, use four or more decimal places. Give your final answer to two decimal places (for example, 98.23% ).