Complex numbers are written in the form a + bi. which of these is/are real numbers? a) a only b) b only c) a and b only d) i only e) a, b, and i

x = 3 ± √(5+y)

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: