What’s the distance ?

Step-by-step explanation:

This problem asks one to find the length of the given line. Another way to think about this problem is to believe that the problem asks one to find the distance from one point to another. The endpoints on this line are the following,

The formula to find the distance between two points on a 2-dimensional coordinate plane is as follows,

Substitute the endpoints of the line into the formula and solve for the distance between the points,

Simplify, solve for the distance between the two points,

answer for #1 is c

answer for #2 is d

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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: