Find the surface area of the sphere with the given diameter or radius.
1. d=8ft

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.