Pre-Calculus

3) 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

 

W(t) =

 

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.

14) Find the specified vector or scalar. Show your work. u = -4i + 1j and v = 4i + 1j; Find .

15) Find the exact value of the trigonometric function. Do not use a calculator.