Will up-vote!

what is 19.2 * 10^8 minutes in hours?

a. 1.152 × 10^11 h

b. 1.152 × 10^7 h

c. 3.200 × 10^9 h

d. 3.200 × 10^7 h

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