Every week, SallySally plays tennisplays tennis for twotwo hourshours, and herher grade on each EnglishEnglish test...
Every week,
SallySally
plays tennisplays tennis
for
twotwo
hourshours,
and
herher
grade on each
EnglishEnglish
test is
9090
percent.
Last week, after
playingplaying
for
twotwo
hourshours,
SallySally
considered
playingplaying
for an additional hour.
SheShe
decided to
playplay
for another hour and cut
herher
study time by one hour, but last week
herher
EnglishEnglish
grade was
7070
percent.
What was
SallySally's
opportunity cost of the
thirdthird
hour of
tennistennis?
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Every week,
SallySally
plays tennisplays tennis
for
twotwo
hourshours,
and
herher
grade on each
EnglishEnglish
test...
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employees, whose job is to cut out wooden knife handles, worked 51
hours during a week in January. The employee earns $15 per hour for
a 40-hour week, and overtime is paid after 40 hours. For additional
hours the employee is paid an overtime rate of $20 per hour. The
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hours
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