7. Simplify the expression. Write the answer using scientific notation. (0.4x10-6)(0.7x10-2)
O 2.8 x 10-7
O 2.8 x 10-8
O 0.28 x 10-9
O 2.8 x 10-9

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)

Joanie watched 1 out of three of a movie in the morning

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