If you were making a model of an estuary, which of the following elements would be the most important? a. The depth of the water to which the sunlight can penetrate
b. The water temperature
c. The mix of fresh water and salt water
d. The presence of hydrothermal vents

PLZ ANSWER FAST WILL GIVE BRAINILIST

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

he has now walked a total of what?

if i know what this is maybe i can

step-by-step explanation:

a

step-by-step explanation: