Question

Delisa is designing a website that will be viewable on both computers and mobile devices, so the website as it is seen on a mobile device is proportional to the website as it is seen on a computer. The diagonal of Delisa's computer monitor is 21 inches, and the diagonal of Delisa's tablet is 9.3 inches.

If an image is 18 centimeters wide on the website when it's displayed on Delisa's computer, how wide should the image be on the tablet? Round to the nearest tenth of a millimeter, if necessary.

Answer 1

this confuses me

Answer 2

I'll give a medal to anyone who at least attempts this

Answer 3

hello?

Answer 4

The size of website on the computer and on the tablet are in a ratio.
We are given the diagonal of the computer monitor is 21 inches
and the diagonal of tablet is 9.3 inches
So the ratio of screen size of tablet to the computer monitor \[\frac{9.3}{21}\]
If an image is 18 cm wide on the computer, we have to find its size on tablet, so
\[\frac{x}{18}= \frac{9.3}{21}\]
so
\[x= \frac{9.3}{21} \times {18}\]
\[x=7.9714 cm\ or\ 79.71 mm\]
if we round off =>79.7 mm