A person-hour is a unit of
measure representing one
person working for one hour.
A
construction foreman
estimates that it will take
2880
person-hours to build a
new library. If 12
workers are
scheduled to work on the
project at the same time, how
many hours will it take to
complete the project?
Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)