Final answer:
Regular sundaes are typically 8 ounces, milkshakes or concretes are around 11 ounces, and an RB Float often comes in a 16-ounce serving when combining both soda and ice cream.
Step-by-step explanation:
The student is asking about the sizes in ounces for different dessert and drink items. For a regular sundae, a commonly seen size is 8 ounces, similar to single servings of coffee ice cream or hot cocoa.
Shakes or Concretes typically come in various sizes, but a common medium size is around 11 ounces, according to the reference information. Regarding the RB (Root Beer) Float, it is often served in a 16-ounce size, if using a standard soda can size (12 ounces) plus the volume for ice cream.
When measuring these items, one would use measuring cups and may refer to conversion factors, such as 16 ounces equaling 1 pound.