Brandon's class has 7 boys and 13 girls. explain how do the ratios 7: 13 and 7: 20 describe brandon's class?

Pick the description of a geometric object that best matches the real world object box for a deck of card

Enter the missing numbers in the boxes to complete the table of equivalent ratios of lengths to widths. ? 18 8 ? 10 30 12 ?

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%