from 1960 to 1970, the consumer price index (CPI) increased from 29.6 to 38.8 if a dozen tangerines cost 0.31 in 1960 and the price of tangerines increase at the same rate as the CPI from 1960 to 1970, approximately how much did a dozen tangerines cost in 1970

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:

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.

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