A furniture store bought a dining set wholesale for $300 and marked it up 20%. When the dining set didn't sell, they reduced the price 20%.

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:

step-by-step explanation:

the right answer is 1.

you.

hope it .