The area of the triangle can be calculated through the equation, A = sqrt ((s)(s - a)(s - b)(s - c)) where A is area, s is the semiperimeter ((a + b + c)/2), a, b, and c are the sides given above.
The presented equation above is the Heron's formula.
Substituting the known values, s = (8.7 + 10.1 + 9.8) / 2 s = 14.3
A = sqrt ((14.3)(14.3 - 8.7)(14.3 - 10.1)(14.3 - 9.8)) <em>A = 38.9 units squared
</em>Thus, the answer to this item is not among the choices. <em> </em>
you have to multiply .79 to both a and 1.2. A is wrong because it's saying we need to multiply .79 to 1.2lb. which is the weight of oranges and the total cost of apples and oranges which is 6.27.
