Help me please
I want the step by step explanation!!

The length of AB is 4.12cm and AD is 9.93cm

Step-by-step explanation:

Using the formula, a²=b²+c²-2(b)(c)cosA to find the length :

cos ∠ACB = 0.6

∠ACB = 53.1° (1d.p)

c² = 5² + 4² - 2(5)(4)cos(53.1)

= 16.98 cm

c =√16.98

= 4.12 cm

AB = 4.12 cm

∠ACD = 180° - ∠ACB

= 180° - 53.1°

= 126.9°

c² = 7² + 4² - 2(7)(4)cos(126.9)

= 98.62 cm

c = √98.62

= 9.93 cm

AD = 9.93cm

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63

i think it would be c

mark brainliest if im right

step-by-step explanation: