Which graph represents the solution set if the compound inequality? -5

-5 < a - 4 < 2

solving for a

a - 4 > - 5

a >  -1    and

a - 4 < 2

a < 6

So the correct solution set is the third one.

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:

it goes right