A graphing calculator is in the approximate shape of a rectangular prism.
- a. Estimate the total surface are of the calculator.
- b. The window of the calculator is 6.5 centimeters longs and 4.5 centimeters wide. Estimate the surface of the graphing calculator without the window.
The Calculator is 2.5cm tall, 9cm wide, and 19cm long.
+45 
