ABCD is a rhombus and CDEF is a rectangle. if m<BAD=40 then find m<CDE I think the answer is 20 but I'm not 100% sure

What is the square root of 45? (step by step working plz)

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Will give let f(x)=2x and g(x)=[tex]2^{x}[/tex] graph the functions on the same coordinate plane. what are the solutions to the equation f(x)=g(x) ? enter your answers in the boxes x=[? ] or x=[? ]