Will pick brainliest! I need help with this, actual effort in answering is much appreciated.

option 2

Step-by-step explanation:

4^2=16/8=2.  4^2=16/16=1.  2-1=1

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

- (2, -7)

- lines r and s and lines t and u must be parallel