Please In 4 years, a reef’s elevation fell from 10 mm above sea level to 2 mm below sea level. The expression (-2-10)•4 gives the change in elevation per year. What was the change in elevation in mm per year? A. 2mm/yr B. -2mm/yr

C. 3mm/yr D. -3mm/yr

Explanation please!

idk

step-by-step explanation:

98 points djdjsi zisksis sjsjsi sisksj sksjdj sksks sjsisj

it is not that hard all u have to do is plot the graph

step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft