An office building has three air conditioning units, one for each office. each unit runs only when employees are working.
the tables below show the number of hours employees worked at each office over a three-month period and the total air
conditioning electric costs for the entire office for each month.
o
ninino
number of hours worked
unit a
unit b
june 184
207
july 174 1 98 vitin
august 168 1 89
erre
total air conditioning electric costs
june
$142.60
july
$135.96
august
$128.30
!
how much does it cost to run unit a per hour?