# SOLUTION: What is the exact area of a circle with a diameter of 19 inches? (a) {{{9.5pi}}} square inches (b) {{{19pi}}} square inches (c) {{{38pi}}} square inch

Algebra ->  Surface-area -> SOLUTION: What is the exact area of a circle with a diameter of 19 inches? (a) {{{9.5pi}}} square inches (b) {{{19pi}}} square inches (c) {{{38pi}}} square inch      Log On

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 Geometry: Area and Surface Area Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Surface-area Question 311541: What is the exact area of a circle with a diameter of 19 inches? (a) square inches (b) square inches (c) square inchesAnswer by Edwin McCravy(9717)   (Show Source): You can put this solution on YOUR website!What is the exact area of a circle with a diameter of 19 inches? (a) square inches (b) square inches (c) square inches ``` The formula for the area of a circle is where represents the radius, The radius is half the diameter. Since the diameter is 19, the radius is half that or Substituting: square inches, or as a decimal So it isn't any of the choices you gave. Maybe you mistyped and meant the circumference. If so, then the formula for the circumference is inches So if you meant circumference then that is a choice; however the unit for circumference is just plain 'inches', not 'square inches'. You'll have to ask your teacher what was meant, because as it is the problem is botched. Edwin```