For a certain company, the relationship between revenue R (in billions of dollars) and the number of full-time employees n (in thousands) can be approximated by 500OR =n dn (a) Would ap be expected to be positive, negative or zero? Why? dn (b) Find dR . What are the units? dn (c) Find ap when R = 119 and n = 305, and interpret the answer. dn (a) Would dR be expected to be positive, negative or zero? Why? dn The value dR Is expected to be because if revenue grows it would be expected that employees would be hired compared to last time (b) Find - dn Select appropriate units for - dn dR dR dn dR (Type an exact answer.) (c) Find dn do when R = 119 and n = 305 an dR =0 (Do not round until the final answer. Then round to three decimal places as needed.) If revenue grows by 1 billion dollars, then a corresponding of approximately employees is expected