Jacob has a bag of hair bands. In the bag there are 10 red hair bands, 9 green hair bands and 5 orange hair hands. He takes one hair band out, records its color hair band and puts it back in the bag. He then draws another hair band. What is the probability of taking out a red hair band followed by the green hair band?

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

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:

explanation:

step-by-step explanation: