Solve.How many 2-letter codes can be formed with the letters P, Q, R, S, T without repetition?
A. 4
B. 40
C. 20
D. 10
Answer: C
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A company, with 1080 total employees, prepares the following analysis for the length of time its employees have been with the company. Use the table to answer the question. 
Write a simplified ratio in three different ways of the number of employees working 2 years or less to the total number of employees working more than 2 years.
A. 5 to 24, 5:24, 
B. 5 out of 24, 5:24, 
C. 5 to 19, 5:19, 
D. 5 to 19, 5;19, 
Write the expression in terms of sines and/or cosines, and then simplify.(1 - csc ?)( 1 + csc ?)
A. tan2 ? B. cos2 ? C. -csc2 ? D. -cot2 ?
Perform the indicated operations, expressing the answer in simplest form with rationalized denominators.
A. 2yz2
B. 128y7z9
C. 128yz 
D. 2yz 
Find the missing quantities as requested.Find the diameter.
A. 119.006 mi B. 75.8 mi C. 18.95 mi D. 4,510.33 mi