What adds to equal -1 and multiplied to equal -90

-10 & 9

Step-by-step explanation:

-10• 9 =-90

-10+9= -1

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

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: