Greg, a highway safety inspector, is concerned about the potential for accidents caused by boulders that fall down a sandstone diff beside a main highway. As part of an accident simulator, Greg models the boulders' weights using a normal distribution with a mean of 567 kg and a standard deviation of 150 kg. Use this table or the ALEKS calculator to find the percentage of boulders that weigh between 273 kg and 645 kg 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%). X .5