Zoe is trying to decide how to divide her time between her job as a wedding photographer, which pays $40 per hour for as many hours as she chooses to work, and as a rock collector, in which case her pay depends both on the price of the rocks and the number of them she finds. these are special rocks so they have value! earnings aside, zoe is indifferent between the two jobs. the number of rocks she can expect to find depends on the number of hours she searches: hours per day total rocks per day0 01 72 133 174 205 21a. the marginal cost of spending one hour hunting for rocks is equal to $ .b. if the price per rock is $10 then the marginal benefit of spending one hour hunting for rocks is equal to $ .c. if the price per rock is $20, then her best choice is to spend hours hunting for rocks. d. if the price per rock falls to $10 then her best choice is to spend hours hunting for rocks.

Explanation:

a. Marginal benefit is an additional gain of benefit arises from the production of an additional unit of good.

b. if the price per rock is $10 dollars, the marginal benefit will be;

rock collected in an hour x price

7 x 20 = $140.

c. from the attached table, Zoe will make a maximum marginal benefit $140 for working for an hour.

d. from the attached table, Zoe will make a maximum of $70 dollars for working for an hour, beyond that the marginal benefit will begin to reduce.

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answer; o anticipate where news will happen;