Help me pleasee!! ill give you brainliest

Which of the following is the correct ratio for converting kilograms to grams

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%