-4( -2 X -3 -7) + (-2 - 3 X 3) =

,xzgv

step-by-step explanation:

; oqirjg'

28

step-by-step explanation:

because that's the answer

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:

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63