Question

Easy 10 points to make by answering this question. Thank you!

Answer 1

b). 18.3

Explanation:

c² = a² + b² - 2bc (cos A)

= 12.4² + 9.9² - 2(12.4) (9.9) x cos(110)

= 153.76 + 98.01 - 245.52 x cos(110)

= 251.77 - 245.52 x -0.342

c² = 251.77 + 83.97

c² = 335.74

c = 18.3