A triangle has side lengths 8, 12, and 10.

Heron's formula:

Area = √s(s - a)(s - b)(s - c)

Where s = semiperimeter = (a + b + c) / 2

Use the triangle pictured to calculate the following measurements. Then, calculate the area rounded to the nearest tenth using Heron's formula:

Perimeter: P = ____ units
Semiperimeter: s = ____ units
Area: A = ? square units

A) Perimeter: 30 units, Semiperimeter: 15 units, Area: 48.0 square units
B) Perimeter: 30 units, Semiperimeter: 10 units, Area: 24.0 square units
C) Perimeter: 40 units, Semiperimeter: 20 units, Area: 96.0 square units
D) Perimeter: 40 units, Semiperimeter: 15 units, Area: 60.0 square units