PLZ I NEED HELP IM SO TIRED PLZ

the answer is C

Step-by-step explanation:

A

Step-by-step explanation:

Add: 1/

3

+ 1/

9

= 1 · 3/

3 · 3

+ 1/

9

= 3/

9

+ 1/

9

= 3 + 1/

9

= 4/

9

⊂⊃⊂⊃ω

step-by-step explanation:

i hope this : )

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: