8. The aspect ratio of a television screen is the ratio of the measure of the horizonta length to the measure of the vertical height
Find the horizontal length of a television screen with an aspect ratio of 4 : 3 and
vertical height of 90 cm.​

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:

you need to add a picture

the real question is why is this guys last name heavyfoot

step-by-step explanation: