How do i find the area of a composite shape but with the formula of a= b•h

Area = b x h
so multiply the base of the shape by the height of the shape and add cm^2

for example , b=6. h=2. 6x2=12.
12cm^2

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.