What is necessary to write a number in scientific notation? Select all that apply. A. One factor is greater than 10. B. The number is written as the product of three factors. C. The number is written as the product of two factors. D. One factor is a power of 10 with the exponent being an integer. E. One factor is greater than or equal to 1 and less than 10. OF. One factor is a power of 10 with the exponent being a decimal.

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c

step-by-step explanation:

c

< 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)