pattyp4506
Answered

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help theres a time limit​

Help Theres A Time Limit class=

Sagot :

Tasyha

Answer:

C. [tex] = 36 \sqrt{7} {cm}^{2} [/tex]

Step-by-step explanation:

[tex]3 \sqrt{3} \times 4 \sqrt{21} {cm}^{2} [/tex]

[tex]12 \sqrt{63} {cm}^{2} = \sqrt{ {3}^{2} \times 7 } \\ = \sqrt{ {3}^{2} } \sqrt{7} = 3 \sqrt{7} [/tex]

[tex]12 \times 3 \sqrt{7} {cm}^{2} [/tex]

[tex]\boxed{\green{ = 36 \sqrt{7} {cm}^{2}}} [/tex]

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