1/2-5/6 can someone help me

Asphere has a diameter of 10 in. what is the volume of the sphere?

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

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