Identify the following variables as either discrete or continuous:

(a) The number of times heads comes up in 100 tosses of a coin
(b) The number of accidents occurring in a spec­ified section of a freeway
(c) The weight of boxes shipped from an Ama­zon warehouse
(d) The concentration of carbon dioxide in the air of San Diego versus time
(e) Optimistic, most likely, and pessimistic esti­mates of salvage value


(a) Discrete
(b) Discrete
(c) Continuous
(d) Continuous
(e) Discrete

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An R-22 refrigeration system requires a superheat of 8°F. If the evaporator saturation pressure is 43 psig, what should the bulb temperature be?

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