Two buses are moving towards each other, one at a speed of 40 mph and the other at a speed of 50 mph. how much closer to each other will they be in one hour? in two hours? in three hours?

Chuck is making a salad to go with his soup. the recipe calls for 2.1 cups of lettuce per person and 0.56 ounces of salad dressing per cup of lettuce. if 11 dinner guests want salad, how many ounces of dressing will be necessary? round the answer to the nearest whole ounce. 1 ounce 2 ounces 6 ounces 13 ounces