The perimeter of a rhombus is 28 centimeters. what is the length of each side of the rhombus?

cm

This is different from the first one can someone me

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

Which of the following is the result of expanding