Question 1 of 17
1 point
what is the explicit formula for this sequence?
20, 10,5, 2.5,
o a. an = 20. (e)"
o b. an = () • 2019 - 1)
o c. an = 20.)
o d. 2n = 20 • 2(n-1)
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2

step-by-2step explanation:

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: