I can easily tell in 24 days J's dog will finish one bag.
10 ounces x 24 days = 240 ounces of dry dog food
Now I know that in 24 days J's dog finishes one bag of dry dog food, I also know that there are three bag of dry dog food and it takes 24 days to finish one 15 pound bag. So I will multiply 24 days by 3 bags of dog food.
24 days x 3 bags of dog food = 72 days
ANSWER: IT WILL TAKE 72 DAYS TO FINISH 3 BAGS OF 15 POUND DOG FOOD.
Just put the numbers in order then the interquartile range would be the largest number from the high quartile and the lowest number from the lower quartile.