To find the area of a composite figure, separate the figure into simpler shapes whose area can be found. Then add the areas together. Be sure than none of the simpler figures have overlapping areas
The formula of an area of a circle:

We have
r = 1.8 m
π ≈ 3.14
Substitute:

2 (-18 - 6) = -48
By order of operations (PEDMAS) the parentheses are calculated first.
16 nickles
10 dimes
1.00$ + 0.80$
206 X .4 = 82.4
That's the answer.