A cube of an unknown metal measures 0.200 cm on one side. The mass of the cube is 71.7 mg. Which of the following is most likely the unknown metal?

DDT stands for dichlorodiphenyltrichloroethane. It is a colorless, synthetic chemical originally developed and widely used as a powerful insecticide. Its chemical formula is C₁₄H₉Cl₅. Using this chemical formula, calculate the percentage by mass of carbon in DDT.

Prepare a balance sheet and income statement as of December 31, 2026 for Builtrite Inc., from the following information.  •         Inventory                                            $9,000                                         •         Common equity                                      ?                                             •         Cash                                                      6,000                                         •         Operating expenses                            3,000                                •         Notes payable                                    18,000                          •         Interest expense                                     500                                        •         Depreciation expense                         1,000                                             (Not included in operating expenses)                                •         Net sales                                            21,000•         Accounts receivable                            8,000                   •         Accounts payable                                5,000•         Long-term debt                                  52,000•         Cost of goods sold                             10,000•         Buildings and Equipment                150,000•         Accumulated Depreciation               25,000•         Taxes Paid for 2026                             1,500•         Common stock dividend paid             1,000•         Common Stock                                  40,000 What is the common equity amount for the balance sheet?

Your Spark cluster has 10 machines, each with 4 cores. An RDD has 100 partitions. If we call .map(…), how many tasks can run concurrently?

 Which method creates a Hive table from a DataFrame?

What does this MapReduce job compute?

Which of the following is the fundamental data structure of Spark?

Consider the following sequence of PRN’s. 0.49    0.53    0.32    0.63    0.83     0.47     0.03     0.12     0.17     0.23     0.45     0.48 How many runs above and below the mean (0.5) does this sequence have? 

Builtrite Furniture produced revenues of $2,500. It has COGS of $1100 and operating expenses (excluding depreciation) of $600, depreciation of $130, current assets of $210, wages payable of $30 and interest expense of $40. Its tax rate is 21 percent. What is the firm’s net income after taxes?

TRUE or FALSE ? In the Arena Call Center model discussed in class, each server specialized in one product type.