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Step-by-step explanation:

12/e= 20/60

D

Step-by-step explanation:

Convert all measurements the same units of time, so one hour becomes 60 minutes.

12 entrees and e entrees correspond to each other

20 minutes and 60 minutes correspond to each other

so the proportion would be

or answer choice D

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:

more i think

hope this !