It means that it is a rate that is decreasing or declining.
Answer:D
Step-by-step explanation:
1
12
12
12
12
12=60
If this is supposed to be

Then this can simply be reduced to

by the double angle formula for cosine
Are you trying to add together everything she made in a span of time? If so:
22 + 55 + 38 + 25 = 140
Not sure but good luck 25•