Hii they asked this again but in cm ​

Perimeter=2(L+B)=2(9+3)=

Area =

=

Hope it helps

the y will be in still but your answer will be y x 3

step-by-step explanation:

jk: )

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: