What is the surface area of this figure?

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

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution

Point q is equidistant from the sides of ∠tsr. find m∠rst.