2
find the distance between
the points a (3.5) and b (78)

5

Step-by-step explanation:

Calculate the distance using the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = A(3, 5) and (x₂, y₂ ) = (7, 8)

AB =

     =

     = = = 5

Answer: 74.5

Step-by-step explanation: Whenever you see the words distance or difference in a problem, it means to subtract. So, we know that we need to subtract 3.5 from 78.

78 - 3.5 = 74.5

So, the distance between points A and B is 74.5.

Hope this was helpful! :) Let me know if you have any further questions.

12.5 feet

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: