To enter formulas in worksheets, the worksheets cannot be grouped

Which statement in the following sequence of statements about sorting objects by two fields is false?

a. To sort objects by two fields, you create a Comparator that uses two Functions. b. First you call Comparator method comparing to create a Comparator with the first Function. c. On the Comparator for the first field, you call method comparing with the second Function. d. The resulting Comparator compares objects using the first Function then, for objects that are equal, compares them by the second Function.

Concrete delivered to a construction site costs $250 a cubic yard. What is the cost of the concrete needed to build a 6-inch-thick patio slab 20 feet by 10 feet?

Additional information: The volume of a rectangular slab is the product of its three dimensions. The 6 inches thickness of the slab is 1/2 foot thick Preliminary calculations Compute the volume in cu ft for the entire job 20 (ft) * 10 (ft) * 1/2 (ft) = 100 (cu ft) Since this is the entire job 100 (cu ft /job) Note: An alternative approach would be to include the volume calculation in the equation below. However, doing it as a preliminary calculation seems more straight forward.