The hiker's elevation was 50 feet above sea level. 2. The opposite of -13

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

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base