Answer:
$198.72
Step-by-step explanation:
S₃ = 37
given a₁ = 16 and r = , then
a₂ = a₁ × = 16 × = 12
a₃ = a₂ × = 12 × = 9
then
S₃ = a₁ + a₂ + a₃ = 16 + 12 + 9 = 37