How to solve it? I dont know the solving ways

6.2 cm

Step-by-step explanation:

Apply the Law of cosines, given as:

c² = a² + b² - 2ab×Cos(C)

Where,

a = 4 cm

b = 8 cm

c = AB = ??

C = 50°

Plug in the value into the equation

c² = 4² + 8² - 2*4*8*Cos(50)

c² = 16 + 64 - 64*Cos(50)

c² = 80 - 64*Cos(50)

c² = 38.861593

c = √38.861593

c = 6.2 cm (nearest tenth)

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%