Which situation describes a time when it would be all right to round the numbers? a. derek wants to buy a loaf of bread for $4.50 and another loaf for $4.75. the cashier is thinking about rounding each price to the nearest whole number. he would charge derek $5 for each loaf. b. joan needs a piece of wood 12.2 cm long and another piece 3.35 cm long. she is thinking about rounding to the nearest whole number. she would cut the pieces 12 cm and 3 cm. c. abraham wants to buy a table for $100.20 and a chair for $44.25. he wants to make sure he has enough money, so he rounds the prices to the nearest dollar. d. john estimates that he needs about 10.75 lb of beef and 8.5 lb of pork for his party. he wants to make sure he has enough meat. he thinks he will round to the nearest whole number and buy 20 lb of meat.