You drive 4 miles from your house to your friend's house. your house is at an elevation of 622 feet. your friend's house is at an elevation of 486 feet. what is the mean change in elevation per mile?

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: