Find the trigonometric answer

Cos 108° ≈

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

Find the commission on a $590.00 sale if the commission is 15%.

Write the equations in logarithmic form 9^4=6,561