The class with eggs to find the area of a circle with the diameter of 2 centimeter brandy solve the problem showing all her work explain and find the error brandy made

a=§r2(the usual sigh didnt have it)
a=3.14×12square2
a=452.2cm2

The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) compute the z-score corresponding to the individual who obtained 42.342.3 miles per gallon. interpret this result.