How do you solve this?
X+y+z=8
xyz=8
1/x+1/y+1/z=8

What is x, y and z?

a. she will receive a refund of $278.

step-by-step 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:

c

step-by-step explanation: