Freaking out here, pls help asap

Find the Area of the figure below, composed of an isoceles trapezoid and one
semicirde, Rounded to the nearest tenths place

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?