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:
i'm assuming that it's c.) volcanoes built the mountains and earthquakes tore them down.