How much g/kg should pie be to serve 5 people? A kg of a pie can serve up to 20 people So should I just divide 20 by 5? Which will make 400 g? Am I right or not and why?

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: