doug earns $10.50 per hour working at a restaurant. on Friday he spent 1 3/4 hours cleaning 2 1/3 hours doing paper work, and 1 5/12 hours serving customers. what were dougs earnings?

b

step-by-step explanation:

the word superfluous means unnecessary

x/3-10=8

x/3=18

x=48

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:

77

step-by-step explanation: