If f(x).
f(x) is an exponential function where f(−2.5)=19
and f(2.5)=85
then find the value of f(5)
to the nearest hundredth

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b