The area of a picture projected on a wall varies directly as the square of the distance from the projector to the wall. If a 20 ft distance produces a 16 ft picture, what is the area of a picture
produced when the projection unit is moved to a distance 40 ft from the wall?
Round your answer to the nearest square foot if necessary.
The area of the picture projected on a wall is.
wall.
ft- if the projection unit is 40 ft from the

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:

step-by-step explanation:

range =5

step-by-step explanation:

to find the range, we take the largest value and subtract the smallest value.

the largest value is 5

the smallest value is 0

the range is 5-0   =5