Pierce works at a tutoring center on the weekends. At the center, they have a large calculator to use for demonstration purposes that is a scale model of calculators available for the students to use.
Each key on the student calculators is 16 millimeters wide, and each key on the demonstration calculator is 6.4 centimeters wide. If the student calculators are 245 millimeters tall, how tall is the demonstration calculator?
First, we need to determine how many times larger the keys are on the demonstration calculator compared to the student calculators.
6.4 cm = 64 mm
64 mm / 16 mm = 4 times larger
Next, we need to determine how many times larger the overall size of the demonstration calculator is compared to the student calculators.
Since each key is 4 times larger, the overall size will be 4 times larger in both dimensions.
245 mm * 4 = 980 mm
Therefore, the demonstration calculator is 980 millimeters tall.