A submarine went to a height of -140 feet after 14 hours. If the submarine kept descending, and is currently at a height of -284.6 feet, for how long has the submarine been descending?​

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

43lbs of tomatos cost $387. how much would 41lbs cost

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.