What is the measure of ∠D?

Enter your answer as a decimal in the box. Round only your final answer to the nearest hundredth.

What is the domain of the function f(x)=^9x

What is the value of x when x + 7 = 21?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?