A dependent key is a field or combination of fields on which all fields in the table are functionally dependent.
Answer the following statement true (T) or false (F)
False
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If the boat has efficiency e, the amount of fuel used when traveling at a speed s for time t is . The distance traveled in that time is .
Consider a class MotorBoat that represents motorboats. A motorboat has attributes for • The capacity of the fuel tank • The amount of fuel in the tank • The maximum speed of the boat • The current speed of the boat • The efficiency of the boat’s motor • The distance traveled The class has methods to • Change the speed of the boat • Operate the boat for an amount of time at the current speed • Refuel the boat with some amount of fuel • Return the amount of fuel in the tank • Return the distance traveled so far a. Write a method heading for each method. b. Write preconditions and postconditions for each method. c. Write some Java statements that test the class. d. Implement the class.
Which of the following Microsoft Office applications is a relational database software application that is used to record and link data, query databases, and create forms and reports?
A) Word B) Excel C) Access D) PowerPoint
The formula =B2*B7 is located in cell C7. Which cell is the dependent cell?
A) B2 B) B7 C) B3 D) C7
Information that is stored in rows and columns is referred to as a(n) ________
A) table B) array C) chart D) record