Question

Write the following numbers in decimal form. (Note: Some of these numbers have been rounded.)

The width of a pixel on a smartphone is 7.8 × 10^−2 mm

Answer 1

So in decimal
`7.8* 10^(-2)mm` will be equal to 0.078 mm

Explanation:

We have given the width of the pixel on a smart phone is
`7.8* 10^(-2)mm`

We have to write this into decimal form

`10^(-2)=(1)/(100)`

So for converting
`7.8* 10^(-2)mm` into decimal we have to divide 7.8 by 100

So
`7.8* 10^(-2)mm` =
`(7.8)/(100)=0.078mm`

So in decimal
`7.8* 10^(-2)mm` will be equal to 0.078 mm