What is the final elevation if a. A bird starts at 20 m and changes 16 m?
b. A butterfly starts at 20 m and changes -16 m?
c. A diver starts at 5 m and changes -16 m?
d. A whale starts at -9 m and changes 11 m?
e. A fish starts at -9 meters and changes -11 meters?

it has to be b I don't know for sure tho

A. So assuming we are dealing with displacement

20 + 16 = 32 m

B. 20 - 16 = 4m

C. 5 - 16 = - 11m

D. - 9 + 11 = 2m

E. - 9 - 11 = - 20m

mr. graef told us it is 13 pints

step-by-step explanation:

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2