Final answer:
Jack has 87 watermelons, as stated in the question. In Exercise 1.6.2, numbers and units are identified for different quantities, such as bottles, miles per hour, fluid ounces, and degrees Fahrenheit.
Step-by-step explanation:
The question asks how many watermelons Jack has if he starts with 87. The answer is simply the number of watermelons Jack has, which is given directly in the question. Therefore, the correct answer to the question is a. 87.
Now let's look at Exercise 1.6.2 to understand how to identify numbers and their units:
- 99 bottles of soda: The number is 99 and the unit is bottles.
- 60 miles per hour: The number is 60 and the unit is miles per hour, which is a unit of speed.
- 32 fluid ounces: The number is 32 and the unit is fluid ounces, which is a unit of volume.
- 98.6 degrees Fahrenheit: The number is 98.6 and the unit is degrees Fahrenheit, which is a unit of temperature.