Question

Pls help ASAP I’ll give brainliest

Answer 1

Answer:

• B. 11.42

Step-by-step explanation:

Use the law of cosines:

• $c = \sqrt{a^2+b^2-2ab*cosC}$

Substitute the values:

• $c = \sqrt{9^2+12^2-2*9*12*cos64}=11.42$