a clothing store sells socks in four sizes: small, medium, large and extra-large. The sizes are sold in the ratio of 3 : 2 : 1. If the store has an inventory of 253 socks how many are medium?

115

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: