According to a survey conducted by Deloitte in 2017, 0.43 of U. S. smartphone owners have made an effort to limit their phone use in the past. In a sample of 50 randomly selected U. S. smartphone owners, approximately owners, give or take , will have attempted to limit their cell phone use in the past. Assume each pick is independent.

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the correct answer is 1: 2

step-by-step explanation:

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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:

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