An underwater robot takes pictures at an elevation of -8 5/12 m relative to sea level. What is the robots elevation expressed as a decimal? Show your work. plz help will mark brainliest

Ill mark the brainliest if you me with the these three questions 7,8,9

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

See attachment below and find the equivalent of tan(∠qsr)