Write the standard equation of the circle with the given center and passes through the given point. Center: (7,-2) ;Point: (1,-6)

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

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?