Please help me need ASAP it’s due in 15 minutes please help

70

step-by-step explanation:

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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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:

might be the correct answer will be question number 2