Line j: y = 1/4x + 4
line k: y = 1/4x + 3
line l: y = 3x + 4
line m: y = 4x + 1/4
these four lines have been graphed on the same coordinate grid. which lines are parallel to each other?
a) j and k
b) j and m
c) l and k
d) l and m

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: