The number of years a radio functions is exponentially distributed with parameter = 1=8 . if jones buys a used radio, what is the probability that it will be working after an additional 8 years?

both equations and proportions are better.

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: