Explain the steps needed to determine the value of the ex below. be sure to provide the correct value of the expression in your explanation. 1/2 —— -2/5. + ( -1/4)

The answer is -1 and 1/2

Step-by-step explanation:

Hope this helps

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: