Help pls asp pls and thank you

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Which graph represents an even function?

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin