Dorothy types 120 words per minute .how many words does dorothy type in 1.75 minutes ?

The correct answer is D.) 210. If you think of it this way, half of 120 is 60. Dorothy types 120 words per minute, so she types 60 words per 30 seconds. Divide that by half again to get 30 words in 15 seconds. at them together, you get 90 words in that .75 of a minute. 120 + 90 = 210. Hope this helped you out, I would appreciate if you rated me the "brainliest answer" if I did!

c. cos ( a - b ) = cos a cos b + sin a sin b

Step-by-step explanation:

Using 180 as a and q as b:

cos (180 - q)  = cos 180 cos q + sin 180 sin q

cos 180 = -1

sin 180 = 0

cos (180 - q)  = (-1) cos q +  (0) sin q

cos (180 - q)  = -cos q