Answer: 58.11 cm³
Step-by-step explanation:
1. The volume can be calculated with the following formula:
[tex]V=h*w*d[/tex]
Where l is the lenght, w is the width and h is the heigth of the smartphone.
2. You know that the dimensions are:
[tex]h=4.9in\\w=2.3in\\d=8mm[/tex]
3. Convert the height and the width from inches to centimeters, as following:
[tex]h=\frac{4.9in*2.54cm}{1cm}=12.44cm[/tex]
[tex]w=\frac{2.3in*2.54cm}{1cm}=5.84cm[/tex]
4. Convert milimeters to centimeters:
[tex]d=\frac{8mm}{10}=0.8cm[/tex]
4. Then, the volume is:
[tex]V=(12.44cm)(5.84cm)(0.8cm)=58.11cm^{3}[/tex]