The wind chill factor represents the equivalent air temperature at a standard wind speed that would produce the same heat loss as the given temperature and wind speed. one formula for computing the equivalent temperature is

where v represents the wind speed (in meters per second) and t represents the air temperature . compute the wind chill for an air temperature of 15°c and a wind speed of 12 meters per second. (round the answer to one decimal place.) show your work.

w(t) = {33-(10.45+10sqrtv-v)(33-t)/2204
33-1.5958(33-t)
if 0≤v< 1.79
if 1.79≤v< 20
if v≥20