Answer:
12 combinations
Step-by-step explanation:
Diameter = 8 cm
radius = diameter/2 = 4 cm
A = pi * r^2
A = pi * (4 cm)^2
A = 16pi cm^2
<span>We have
</span>

Let's take 6 out from the series

<span>Now multiply and divide by 9
</span>


<span>all 1s add up to n
</span>