A) 90-55=35 since a right angle is 90 total\
b)ii
Answer:
5.5 minutes
Step-by-step explanation:
Fill in the given information and solve for t.
75 = -15cos(2πt/15) +65
-10/15 = cos(2πt/15)
t = 15/(2π)arccos(-2/3) ≈ 5.492
The volume reaches 75 dB about 5.5 minutes after the truck arrives.
Is that your test or homework
Are there any multiple choice if not then it would be the inverse operation and that is multiplication so 36 divided by 4 =9 and 9 x 4=36