The diameter of a round dinner plate is 10 inches. what is the area of the plate

So we wan't to know what is the area of a round dinner plate with a diameter of 10 inches. The formula for area of a circle is A=pi*r^2 and the diameter D=2r, so in our case: r=D/2. When we input that into the area we get: A=3.14*(D/2)^2 and that is: A=78.5 in^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.