Saturn is 8.867×108miles away from the Sun. Uranus is 1.787×109 miles away from the Sun. Approximately how many times farther is Uranus from the Sun than Saturn is?

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:

b segment jm is correct i think