Find the percent of change. round to the nearest percent
original: 66
new: 30

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

Arestaurant needs to buy thirty-seven new plates. if each box has five plates in it, how many boxes will they need to buy?

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%