Consider u = {x|x is a positive integer greater than 1}. which is an empty set? {x|x ∈ u and 1/2x is prime} {x|x ∈ u and 2x is prime} {x|x ∈ u and 1/2x can be written as a fraction} {x|x ∈ u and 2x can be written as a fraction}

How can we find the measure of an exterior angle if we know the measurement of an interior angle

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

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.