Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AD = 5 and AC = 15, what is the length of AB in simplest radical form? (Note: the figure is not drawn to scale.)

Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0

What is sin 7x/4 ? i need on this urgent trig

Are the corresponding angles congruent? explain why or why not.