Answer:
<em>(B). 12.9 cm²</em>
Step-by-step explanation:
a = 8 cm , b = 5 cm , c ≈ 12.259 cm
P = 25.259 , s = P/2 ≈ 12.63
≈ 12.856 ≈ 12.9 cm²
101.5
i calculated it
490
d(x)=700-7(30)
7x 30=210
700-210=490
therefore,
r(x)=490