Solve the formula V = T12h for r.

B.

Step-by-step explanation:

The whole aim here is to get r on it's own. So we have to begin by dividing both sides by pi.

V / pi = hr^2

Then, to further get r on it's own, we have to divide both sides by h. This would put it under the fraction with pi.

V/(pi*h) = r^2

Then, finally, we have to square root both sides.

sqrt(V/(pi*h)) = r

So the answer is B.

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²