Each key on the student calculator is 12 millimeters wide, and each key on the demonstration calculator is 3.6 centimeters wide. If the student calculators are 248 millimeters tall, how tall is the demonstration calculator
74.4 meters
0.744meter
0.036 meter
8.928 meter
The width of one key on the demonstration calculator is 3.6 centimeters, which is equal to 36 millimeters.
If each key on the student calculator is 12 millimeters wide and the student calculator is 248 millimeters tall, we can calculate the number of keys in the student calculator by dividing the height of the student calculator by the width of one key:
Number of keys = 248 mm / 12 mm = 20.67 keys (approx. 21 keys)
Now, if each key on the demonstration calculator is 36 millimeters wide, we can calculate the height of the demonstration calculator by multiplying the width of one key by the number of keys in the student calculator:
Height of demonstration calculator = 36 mm * 21 keys = 756 millimeters = 0.756 meters
Therefore, the height of the demonstration calculator is 0.756 meters.
So, the closest option is 0.744 meter.