if an image is 21 cm wide on the website when it's displayed on jalissa's computer how wide should the image be on the tablet?

The ratio tablet to computer is given by
[tex]\text{ratio}=\frac{\text{tablet}}{\text{computer}}=\frac{9.7\text{ inches}}{21\text{ inches}}=\frac{9.7}{21}[/tex]This ratio must be preserved, then we have
[tex]\frac{\text{ wide tablet}}{\text{wide computer}}=\frac{9.7}{21}[/tex]By substituting the given values, we have
[tex]\frac{\text{ wide tablet}}{21\text{ cm}}=\frac{9.7}{21}[/tex]then the wide on the table is
[tex]\begin{gathered} \text{ wide tablet = 21}\times\frac{9.7}{21}cm \\ \text{ wide tablet = }9.7\text{cm} \end{gathered}[/tex]which is equivalent to 97 milimeters because 1 centimeter has 10 milimeters. Then, the answer is option C.