Find the total (Actual) Surface Area of the composite 3D Figures (Round to the tenth) I am really lost, it’s the second one I’ve asked, please help! Thank you!

1. are the triangles similar and if so why? what is the value of x? show your work.

How far could you drive on 50 gallons of gas

If a distance of 75 yds is measured back from the edge of the canyon and two angles are measured , find the distance across the canyon angle acb = 50° angle abc=100° a=75 yds what does c equal?