Ann made a 33-step staircase using 1818 toothpicks as shown in the figure. how many toothpicks does she need to add to complete a 55-step staircase?

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:

570, the answer is 570, hope it