For a rectangular solid with length 12 in width 2 in in height 15 in state the appropriate formula for volume and also find the volume

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

What is the y-intercept of the line given by the equation

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm