A single eyelash is 49,000 nanometers thick. How many meters thick is the same eyelash? Write your answer in standard form.

A.) 0.000049

B.) 0.0049

C.) 0.049

D.) 0.49

A

Step-by-step explanation:

You can use an online conversion to make it easier, but you have to divide it by 1000000000, but the computer will most likely put it this as 4.9 x 10^-5. It's a bit complicated, so I suggest using an online conversion.

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)