20. Eight people decide to evenly split the number of Snicker's bars in the value bag. After they split, they had 9 Snicker's
bars a piece. Write and solve an equation to find the number
of Snicker bar's in the bag.

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times

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: