Determine the value of the discriminant and describe the number and type roots for the following x^2+7x+13

In a circle, a 45° sector has an area of 32π cm2. what is the radius of this circle? 32 cm 12 cm 16 cm 8 cm

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5