A comparison of two numbers or variables that can be written in two or may re numbers

b, i believe, but not sure.

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:

wait nvm i know the correct answer now its 100%   81 square feet

~batmans wife dun dun

i have not got your picture clearly so see it once again